Exodus 12:1-3
The Institution of the Passover
12:1 The Lord said to Moses and Aaron in the land of Egypt,
12:2 “This month is to be your beginning of months; it will be your first month of the year.
12:3 Tell the whole community of Israel, ‘In the tenth day of this month they each must take a lamb for themselves according to their families – a lamb for each household.