Exodus 12:3-9
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.
12:4 If any household is too small for a lamb, the man and his next-door neighbor are to take a lamb according to the number of people – you will make your count for the lamb according to how much each one can eat.
12:5 Your lamb must be perfect, a male, one year old; you may take it from the sheep or from the goats.
12:6 You must care for it until the fourteenth day of this month, and then the whole community of Israel will kill it around sundown.
12:7 They will take some of the blood and put it on the two side posts and top of the doorframe of the houses where they will eat it.
12:8 They will eat the meat the same night; they will eat it roasted over the fire with bread made without yeast and with bitter herbs.
12:9 Do not eat it raw or boiled in water, but roast it over the fire with its head, its legs, and its entrails.