Exodus 12:3

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.

Exodus 16:1

The Provision of Manna

16:1 When they journeyed from Elim, the entire company of Israelites came to the Desert of Sin, which is between Elim and Sinai, on the fifteenth day of the second month after their exodus from the land of Egypt.