Deuteronomy 26:2-4

26:2 you must take the first of all the ground’s produce you harvest from the land the Lord your God is giving you, place it in a basket, and go to the place where he chooses to locate his name. 26:3 You must go to the priest in office at that time and say to him, “I declare today to the Lord your God that I have come into the land that the Lord promised to our ancestors to give us.” 26:4 The priest will then take the basket from you and set it before the altar of the Lord your God.