Exodus 12:40-42

Amplified Bible

⁴⁰ Now the period of time the children of Israel lived in Egypt was four hundred and thirty years.^{(A) 41} At the end of the four hundred and thirty years, to that very day, all the hosts of the Lord [gathered into tribal armies] left the land of Egypt.

Ordinance of the Passover

⁴² It is a night of watching to be observed for the Lord for having brought them out of the land of Egypt; this [same] night is for the Lord, to be observed and celebrated by all the Israelites throughout their generations.