The Feast of Firstfruits, associated with the wave sheaf day, marks the beginning of the harvest and initiates the seven-week count to Pentecost, which concludes both the count and the harvest. Both occasions center on the concept of firstfruits, with the wave sheaf offering representing the initial barley harvest and Pentecost featuring two wave loaves made of fine wheat flour, presented as firstfruits to the Lord. The wave sheaf day, though occurring during the environs of Unleavened Bread, holds a stronger connection to Pentecost through these shared themes. Scripture highlights Jesus Christ as the first of the firstfruits, the initiator of God's spiritual harvest, being the firstborn from the dead. This designation implies that others will follow as firstfruits to the Lord, linked to the broader harvest of God's elect. On the wave sheaf day, Christ stands as the chronological firstfruit, the beginning of the spiritual harvest, while on Pentecost, He is the model firstfruit, the standard of excellence that the elect must emulate. The two wave loaves at Pentecost, baked with leaven symbolizing corruption, contrast with Christ's sinless nature, underscoring His preeminence both in time and quality. Thus, Christ remains the central focus of these feasts, guiding and exemplifying the path for those who aspire to be firstfruits in God's Kingdom.

In the Old Testament, the Feast of Firstfruits, known as the day of the wavesheaf, marked the beginning of the grain harvest when the firstfruits of the barley were offered before the Lord. This feast initiated a process that culminated in a larger harvest, symbolizing an early gathering of God's children. The agricultural imagery of reaping grain parallels the spiritual harvest, raising questions about how this harvest of firstfruits is conducted and whether it has already begun. As Christ noted, the fields are already white for harvest, indicating the readiness of the crop at a transitional stage for cutting, much like the early harvest of His church. This harvest, distinct and special, focuses on those who are ripe and ready to be reaped by Him.

To the Jews of Jesus' day, Pentecost was known as the Feast of Weeks and/or the Feast of Firstfruits. Jesus, being the First of the firstfruits, was raised from the dead to eternal life, and He continues to build His house of called-out ones until He returns to resurrect them to eternal life as firstfruits. God, the Master Potter, molds His people into a spiritual nation of firstfruits, shaping them into His holy and righteous character. On the day of firstfruits in AD 31, Jesus began to build His spiritual house of firstfruits, and neither death nor the grave will prevent Him from completing this work.

The Feast of Firstfruits, also known as the Wavesheaf offering, holds a significant place in the biblical instructions for counting to Pentecost. As outlined in Leviticus 23:9-11, the Lord commanded the children of Israel to bring a sheaf of the firstfruits of their harvest to the priest, who would wave it before the Lord on the day after the Sabbath to be accepted on their behalf. This act marks the beginning of the harvest, specifically the barley harvest, as confirmed by Deuteronomy 16:9, which instructs to begin counting seven weeks from the time the sickle is put to the grain. The context of the Feast of Firstfruits is closely tied to the Feast of Unleavened Bread, as Leviticus 23 presents these instructions sequentially after those for Unleavened Bread. The Sabbath referenced in the command is widely understood to be the weekly Sabbath within Unleavened Bread, supported by the use of the definite article in the Hebrew text, which typically denotes the weekly Sabbath. Thus, the day after this Sabbath, often the first day of the week, is when the Wavesheaf is offered and the count to Pentecost begins, as detailed in Leviticus 23:15-16, where seven complete Sabbaths are counted, culminating in a new grain offering on the day after the seventh Sabbath. In years when Passover falls on the weekly Sabbath, the only weekly Sabbath within Unleavened Bread is the last day of the feast. According to the method historically used by the Sadducees, the Wavesheaf offering would then occur on the day following, even if it falls just after Unleavened Bread. This approach prioritizes the identification of the weekly Sabbath within Unleavened Bread as the anchor for the count, ensuring consistency in the timing of the offering and the subsequent harvest. The Feast of Firstfruits is fundamentally about acknowledging God as the Giver and Provider through the first portion of the harvest. The offering is tied to the act of reaping, making it incompatible with occurring on a high holy day, such as the first day of Unleavened Bread, due to the prohibition of servile work on Sabbaths. Historical records indicate that at the time of Christ, the Sadducees, who controlled the Temple rituals, maintained this understanding, offering the Wavesheaf on the day after the weekly Sabbath within Unleavened Bread, regardless of whether it fell within or just after the feast.

The Feast of Firstfruits, also tied to the Feast of Harvest as described in Exodus 23:16, emphasizes the firstfruits of labor sown in the field. Leviticus 23:17 identifies the two leavened loaves offered on Pentecost as firstfruits, a symbol representing the early, abundant sample of a harvest, often signifying not only the earliest but also the best part. This symbol varies widely, as every harvest—whether barley, wheat, olives, grapes, or honey—has its firstfruits, indicating the start of maturation rather than the completion of the harvest. The grain offering of Pentecost, central to this feast, embodies the fruit of one's labors from God's bounty, reflecting devotion and generosity toward others, as it is an offering to God with a portion for human benefit through the priest. This aligns with the instruction in Leviticus 23:22 to leave the corners of the field and gleanings for the poor and the stranger, underscoring the theme of giving humanity its due with what God has provided.

The Feast of Firstfruits, also associated with Wavesheaf Day, holds a significant place in the biblical harvest celebrations. It marks the beginning of the harvest, as outlined in Leviticus 23:9-11, where the Lord commands the children of Israel to bring a sheaf of the firstfruits of their harvest to the priest, who shall wave it before the Lord on the day after the Sabbath. This waving of the sheaf, accompanied by a burnt offering of a lamb and a grain offering as described in Leviticus 23:12-13, symbolizes an offering to God before the harvest can be consumed. Leviticus 23:14 further instructs that no bread, parched corn, or green ears shall be eaten until the offering is made, establishing a statute forever throughout their generations. The timing of the Feast of Firstfruits is tied to the weekly Sabbath that falls within the Days of Unleavened Bread, with the count to Pentecost beginning the day after this Sabbath, as specified in Leviticus 23:15-16. This connection ensures that Wavesheaf Day, the day the sheaf is waved, varies in date each year depending on when Passover falls, necessitating an annual count. The rule is clear: the weekly Sabbath within the Days of Unleavened Bread is the key to determining Wavesheaf Day, directly linking the Feast of Firstfruits to the subsequent observance of Pentecost, both being harvest celebrations integral to the annual cycle of feasts.