Moses
Leviticus 23:8ESV·traditional attribution

But you shall present a food offering to the LORD for seven days. On the seventh day is a holy convocation; you shall not do any ordinary work.”

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

But ye shall offer an offering made by, fire unto the Lord seven days,.... A burnt offering was to be offered unto the Lord on everyone of the seven days, which were two young bullocks, one ram, and seven lambs; besides a meat offering, and a goat for a sin offering, Num 28:19, in the seventh day is an holy convocation, ye shall do no...

Jamieson-Fausset-Brown Reformed @jfbcommentary

THE PASSOVER. (Lev 23:5-8) the Lord's passover--(See Exo 12:2, Exo 12:14, Exo 12:18). The institution of the passover was intended to be a perpetual memorial of the circumstances attending the redemption of the Israelites, while it had a typical reference to a greater redemption to be effected for God's spiritual people.

Commenting on Leviticus 23:5-8