The concept of having the Lord's law in our mouth is a significant aspect of observing the Feast of Unleavened Bread, as it serves as a reminder of God's law and its role in our lives. This day is a sign and a memorial that the Lord's law may be in our mouth, emphasizing that one of the primary reasons for keeping this feast is to focus on His law as a central thrust of our spiritual journey. The phrase "the Lord's law may be in your mouth" encompasses both the intake and expression of God's Word. Just as the mouth is used for eating and speaking, this concept suggests that we are to take in God's law, internalizing it into our hearts and minds, and then express it through our speech and actions. God has made His Word accessible to us, not far off or unattainable, but near, so that it is in our mouths and hearts, enabling us to speak and live it out. This idea is reinforced through the understanding that out of the abundance of the heart, the mouth speaks. By ingesting God's law through the observance of this holy day, we are reminded annually to purge out sin and embrace the unleavened bread of sincerity and truth. The law in our mouth becomes a sign that we are God's people, integral to the process of becoming part of His eternal family. Under the New Covenant, God places His Word in our mouths and His Spirit upon us, aligning us with Him and uniting us in thought, speech, and action. The Feast of Unleavened Bread plays a crucial role in this ongoing process, reminding us each year to actively remove sin and practice righteousness, ensuring that God's law remains in our mouths, hearts, and behaviors as we strive toward the image of Christ.

God's instructions direct that the eating of unleavened bread and the avoidance of leaven serve as a sign on the hand and a memorial between the eyes so that His law may be in the mouth. This requirement flows directly from the remembrance of deliverance out of the house of bondage, establishing that the physical observance exists to keep divine instruction on the lips and in the heart. The same passage shows that the law in the mouth equips God's people to remain free, because the commands identify sin and thereby guard against re-enslavement. When the heart is filled with God's words, speech naturally draws from them, just as Christ answered every temptation with quotations from Deuteronomy. In contrast, words drawn from other sources reveal that the heart has stored something else. The practice of the feast therefore trains the mind to store and speak the law so that the true God remains the one served. This focus on the law in the mouth reinforces the broader message that deliverance must be followed by continued obedience; otherwise the house of bondage becomes the future. By keeping the law on the lips through daily ingestion of sincerity and truth, the delivered remain aligned with the way of life that preserves freedom.