Moses
Leviticus 23:11BSB·traditional attribution

And he shall wave the sheaf before the LORD so that it may be accepted on your behalf; the priest is to wave it on the day after the Sabbath.

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

And he shall wave the sheaf before the Lord,.... Or the omer of barley; this was done by the priest in the tabernacle and temple, where was the presence of God, and that before the handful of it was put upon the altar; which agitation or waving was, as Gersom says, towards the cast; it was moved to and fro, backwards and forwards, upwards and...

Geneva Bible Notes Reformed @genevanotes

And he shall wave the sheaf before the LORD, to be accepted for you: on the morrow after the sabbath the priest shall wave it. (d) That is, the second sabbath of the Passover.