Moses
Leviticus 23:10ESV·traditional attribution

“Speak to the people of Israel and say to them, When you come into the land that I give you and reap its harvest, you shall bring the sheaf of the firstfruits of your harvest to the priest,

John Calvin Reformed @genevareformer

10. When ye be come to the land. Moses now lays down rules as to the second day of festival, which was dedicated to the offering of the first-fruits. The ceremony is described that they should deliver a handful into the hand of the priest; though some think that the measure is signified which was the tenth part of an Ephah.

Matthew Henry Presbyterian @wholebiblehenry

Here again the feasts are called the feasts of the Lord, because he appointed them. Jeroboam's feast, which he devised of his own heart (Kg1 12:33), was an affront to God, and a reproach upon the people. These feasts were to be proclaimed in their seasons (Lev 23:4), and the seasons God chose for them were in March, May and September (according to our present...

Commenting on Leviticus 23:4-14

John Gill Reformed Baptist @doctorgill

Speak unto the children of Israel, and say unto them,.... What is next observed, it being incumbent on them to do what is enjoined: when ye be come into the land which I give unto you: the land of Canaan, which God had given by promise to their fathers and to them, and which they were now going to inherit: as yet they were in...