Moses
Deuteronomy 16:1ESV·traditional attribution

“Observe the month of Abib and keep the Passover to the LORD your God, for in the month of Abib the LORD your God brought you out of Egypt by night.

John Calvin Reformed @genevareformer

1. Observe the month Abib. For what purpose God instituted the Passover, has already been shewn in the exposition of the First Commandment; for since it was a symbol of redemption, and in that ceremony the people exercised themselves in the pure worship of the One God, so as to acknowledge Him to be their only Father, and to distinguish Him from all idols, I...

Matthew Henry Presbyterian @wholebiblehenry

Much of the communion between God and his people Israel was kept up, and a face of religion preserved in the nation, by the three yearly feasts, the institution of which, and the laws concerning them, we have several times met with already; and here they are repeated. I.

Commenting on Deuteronomy 16:1-17

John Gill Reformed Baptist @doctorgill

Observe the month of Abib,.... Sometimes called Nisan; it answered to part, of our March, and part of April; it was an observable month, to be taken notice of; it was called Abib, from the corn then appearing in ear, and beginning to ripen, and all things being in their verdure; the Septuagint calls it the month of new fruit; it was appointed the first...