Exodus 12:42
It [is] a night of vigils [belonging] to Yahweh for bringing them out from the land of Egypt; it [is] this night [belonging] to Yahweh [with] vigils for all of the {Israelites} throughout their generations.
Deuteronomy 16:1-6
"Observe the month of Abib, and you shall keep [the] Passover to Yahweh your God, for in the month of Abib Yahweh your God brought you out from Egypt [by] night.
Exodus 12:14
"And this day will become a memorial for you, and you will celebrate it as a religious feast for Yahweh throughout your generations; you will celebrate it as a lasting statute.
Exodus 13:10
And you will keep this statute at its appointed time {from year to year}.