Exodus 13:1
And the Lord said to Moses,
--------------------
Exodus 13:2
Let the first male child of every mother among the children of Israel be kept holy for me, even the first male birth among man or beast; for it is mine.
Exodus 13:13
And for the young of an ass you may give a lamb in payment, or if you will not make payment for it, its neck is to be broken; but for all the first sons among your children, let payment be made.
Numbers 3:13
For all the first sons are mine; on the day when I put to death all the first sons in the land of Egypt, I took for myself every first male birth of man and beast. They are mine; I am the Lord.
-----
Exodus 12:37
And the children of Israel made the journey from Rameses to Succoth; there were about six hundred thousand men on foot, as well as children.
Exodus 13:3
And Moses said to the people, Let this day, on which you came out of Egypt, out of your prison-house, be kept for ever in memory; for by the strength of his hand the Lord has taken you out from this place; let no leavened bread be used.
Exodus 13:4
On this day, in the month Abib, you are going out.
-----
Exodus 6:10
And the Lord said to Moses,
Public Domain