Exodus 23:15
You shall keep the feast of unleavened bread: (you shall eat unleavened bread seven days, as I commanded you, in the time appointed of the month Abib; for in it you came out from Egypt: and none shall appear before me empty:)
Nave's Topical Index—AKJV

Deuteronomy 16:1
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 forth out of Egypt by night.
Nave's Topical Index—AKJV