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 12:19

12:19 For seven days yeast must not be found in your houses, for whoever eats what is made with yeast – that person will be cut off from the community of Israel, whether a foreigner or one born in the land.

Exodus 17:1

Water at Massa and Meribah

17:1 The whole community of the Israelites traveled on their journey from the Desert of Sin according to the Lord’s instruction, and they pitched camp in Rephidim. Now there was no water for the people to drink.