Moses
Deuteronomy 26:10BSB·traditional attribution

And now, behold, I have brought the firstfruits of the land that You, O LORD, have given me.” Then you are to place the basket before the LORD your God and bow down before Him.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A good work ordered to be done, and that is the presenting of a basket of their first-fruits to God every year, Deu 26:1, Deu 26:2. Besides the sheaf of first-fruits, which was offered for the whole land, on the morrow after the passover (Lev 23:10), every man was to bring for himself a basket of first-fruits at the feast of pentecost...

Commenting on Deuteronomy 26:1-11

John Gill Reformed Baptist @doctorgill

And now, behold, I have brought the firstfruits of the land, which thou, O Lord, hast given me,.... Directing his speech not to the priest, but to the Lord himself; owning that the part of the land he had, and the fruits he enjoyed, were the gifts of God to him, and therefore, as in gratitude bound, brought him the firstfruits: and thou shalt set...

Geneva Bible Notes Reformed @genevanotes

And now, behold, I have brought the firstfruits of the land, which thou, O LORD, hast given me. And thou shalt set it before the LORD thy God, and worship before the LORD thy God: (f) In token of a thankful heart, and mindful of this benefit.