Moses
Deuteronomy 26:2BSB·traditional attribution

you are to take some of the firstfruits of all your produce from the soil of the land that the LORD your God is giving you and put them in a basket. Then go to the place the LORD your God will choose as a dwelling for His Name,

John Calvin Reformed @genevareformer

2. That thou shalt take of the first. We know that in the first-fruits the whole produce of the year was consecrated to God. The people, “Ainsi les enfans d’Israel apportoyent en leur corbeille une protestation qu’ils se vouloyent ranger a Dieu comme enfans, selon qu’ils l’experimentoyent Pere nourissier;” thus the children of Israel bore in their basket a protestation that they desired to rank...

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

That thou shalt take of the first of all the fruit of the earth,.... This oblation of firstfruits was different front the sheaf of the firstfruits brought at barley harvest in the time of the passover, and from the two wave loaves of wheaten flour, at wheat harvest, at Pentecost; and from the cake of the first of their dough; see Lev 23:10.