"Observe the month of Aviv and celebrate the Pesach to Yahweh your Elohim for in the month of Aviv Yahweh your Elohim brought you out of Mitzrayim by night. You shall sacrifice the Pesach to Yahweh your Elohim from the flock and the herd, in the place where Yahweh chooses to establish His name."

Devarim 16:1-2