Deuteronomy 26:1
And it shall be, when thou art come in unto the land which the Lord thy God giveth thee for an inheritance, and possessest it, and dwellest therein;
Cross-reference
Deuteronomy 6:1-10 also addresses life in the promised land, commanding love and obedience as context for the offering.
Deuteronomy 7:1 uses the same 'when you enter the land' formula, describing the conquest of nations as the backdrop.
Deuteronomy 17:14 also begins with 'when you come to the land' and discusses appointing a king, another aspect of life in Canaan.
Deuteronomy 18:9 also starts with 'when you come into the land' and warns against pagan practices, part of the same covenant context.
Deuteronomy 27:2 continues the land-entry narrative, commanding stone monuments—another act tied to crossing the Jordan into the inheritance.
Numbers 15:2 also commands offerings when entering the land, providing additional laws about grain and drink offerings.
Numbers 15:18 similarly instructs a heave offering when entering the land, reinforcing the ritual context of Deuteronomy 26.
Leviticus 23:17 specifies a firstfruits offering of two loaves for the Feast of Weeks, directly parallel to the firstfruits ritual introduced here.
Exodus 13:5 also speaks of entering the promised land, tying the firstfruits command to the foundational promise of the land.
Leviticus 14:34 uses the same introductory phrase 'When you come into the land' for laws on leprosy—a shared formula for land-entry commands.