In the account of Cain and Abel, it is recorded that Cain, a tiller of the ground, brought an offering of the fruit of the ground to the LORD. Abel, a keeper of sheep, brought of the firstborn of his flock and their fat. The LORD respected Abel and his offering, but He did not respect Cain and his offering. This rejection caused Cain to become very angry, and his countenance fell. The LORD questioned Cain, asking why he was angry and why his countenance had fallen, advising that if he did well, he would be accepted, but if not, sin lay at the door, desiring him, though he should rule over it. Despite this, Cain later rose up against Abel in the field and killed him. It is suggested that this event occurred at an appointed time, possibly a Sabbath or holy day, which might have heightened the importance of an acceptable sacrifice. The account implies that there was a standard for offerings, as Abel's sacrifice was deemed more acceptable, indicating he followed specific instructions from God. Cain, aware of what was required, chose to disregard these instructions for reasons not fully disclosed. This disobedience led to the rejection of his offering, contributing to his distress and violent reaction.

Offerings to God are an ancient practice, one of the earliest acts of worship recorded, following obedience. From the beginning, as seen in Genesis 4:1-5, Cain and Abel brought offerings from the fruit of their labors—Cain, a tiller of the ground, offered produce, while Abel, a shepherd, offered the firstborn of his flock and their fat. The Lord respected Abel and his offering but did not respect Cain and his offering, leading to Cain's anger and fallen countenance. This shows that God judges offerings, and not all are acceptable to Him. Something in Cain's offering, likely tied to his motives or character, displeased God, resulting in its rejection, while Abel's offering demonstrated a priority of love toward God. Offerings are also tied to the work and daily lives of those who give them, reflecting the fruit of their labor. God's judgment on offerings reveals that they can be given in vain if the heart and motives are not right. He sees through justifications and excuses, making a perfect judgment on the reasons behind what is given, as evidenced by His rejection of Cain's offering due to underlying issues in Cain's attitude. In Deuteronomy 16:16-17, it is commanded that three times a year, during the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Tabernacles, all males shall appear before the Lord their God and not come empty-handed. Each man is to give as he is able, according to the blessing the Lord their God has given him. This reflects the principle of offering as a tribute, a symbol of subservient status before Him, and an expression of gratitude for His manifold blessings. God does not set a fixed amount but encourages contemplation of how much He has blessed each person, prompting a personal valuation of His work in their lives. In II Corinthians 9:6-8, the principle of giving is further emphasized: he who sows sparingly will reap sparingly, and he who sows bountifully will reap bountifully. Each one should give as he purposes in his heart, not grudgingly or out of necessity, for God loves a cheerful giver. God is able to make all grace abound, ensuring sufficiency and abundance for every good work. This aligns with the contrast between Cain's possible grudging attitude and Abel's likely cheerful and thoughtful giving, which aimed to please God and acknowledged His grace and blessings. Finally, in Psalm 107:1-2 and 19-22, gratitude and thanksgiving are central to offerings. The redeemed are called to give thanks to the Lord for His goodness and mercy, acknowledging His deliverance and healing. Men are urged to offer sacrifices of thanksgiving and declare His works with rejoicing, reinforcing that offerings are an expression of appreciation for His wonderful works and enduring mercy.

Cain brought an offering to God that was not acceptable, unlike Abel's, though both likely received the same instructions. Cain's offering was of the fruit of the ground, possibly a meal offering symbolizing commitment to fellow man, associated with the last six of the Ten Commandments. Ironically, after presenting this offering, Cain coveted Abel's acceptance, killed his brother, dishonored his parents, and lied to God by asking if he was his brother's keeper. God's instructions indicated that a meal offering should follow a whole burnt offering, which symbolizes devotion to God, paralleling the first four commandments. This sequence teaches that true devotion to others is impossible without first being devoted to God. Furthermore, before either offering, a sin offering was required to acknowledge sin and seek atonement. By not offering a blood sacrifice, Cain seemed to suggest he did not need to be reminded of sin or consider a Savior, unlike Abel who offered from the firstborn of his flock. Cain's reaction to God's correction was one of anger, not humility, indicating an unwillingness to learn or accept his sinful reality. His extreme response, including destroying the other human witness and lying to God, reflected a self-centered man feeling deeply threatened. The way of Cain, as later referenced, embodies religion or worship on one's own terms, manifesting in unbelief, rebellion, and a veneer of righteousness while living according to personal desires. Cain's story reveals a man uninterested in the full truth about himself or God's requirements, making assumptions about his standing with God and what was desired of him.