Deuteronomy 26:2-4

2you are to take some of the first of all the produce of the soil, which you gather from your land that Adonai your God is giving you, put it in a basket and go to the place Adonai your God chooses to make His Name dwell.

3You are to go to the kohen in charge in those days and say to him, ‘I declare today to Adonai your God, that I have entered into the land Adonai swore to our fathers to give us.’

4The kohen is to take the basket from your hand and set it down before the altar of Adonai your God.