Moses
Leviticus 23:22ESV·traditional attribution

“And when you reap the harvest of your land, you shall not reap your field right up to its edge, nor shall you gather the gleanings after your harvest. You shall leave them for the poor and for the sojourner: I am the LORD your God.”

Matthew Henry Presbyterian @wholebiblehenry

Here is the institution of the feast of pentecost, or weeks, as it is called (Deu 16:9), because it was observed fifty days, or seven weeks, after the passover. It is also called the feast of harvest, Exo 23:16. For as the presenting of the sheaf of first-fruits was an introduction to the harvest, and gave them liberty to put in the sickle, so they...

Commenting on Leviticus 23:15-22

John Gill Reformed Baptist @doctorgill

And when ye reap the harvest of your land,.... This law is repeated from Lev 19:9; and as Aben Ezra observes, the feast of weeks being the feast of the firstfruits of the wheat harvest, it is repeated, that they might not forget what God had commanded them to do at that time, namely, to leave somewhat for the poor; and the Jewish writers (a)...

Jamieson-Fausset-Brown Reformed @jfbcommentary

FEAST OF PENTECOST. (Lev 23:15-22) ye shall count unto you from the morrow after the sabbath--that is, after the first day of the passover week, which was observed as a Sabbath.

Commenting on Leviticus 23:15-22