Exodus 12:5

2 `This month [is] to you the chief of months -- it [is] the first to you of the months of the year;

3 speak ye unto all the company of Israel, saying, In the tenth of this month -- they take to them each man a lamb for the house of the fathers, a lamb for a house.

4 `(And if the household be too few for a lamb, then hath he taken, he and his neighbour who is near unto his house, for the number of persons, each according to his eating ye do count for the lamb,)

5 a lamb, a perfect one, a male, a son of a year, let be to you; from the sheep or from the goats ye do take [it].

6 `And it hath become a charge to you, until the fourteenth day of this month, and the whole assembly of the company of Israel have slaughtered it between the evenings;

7 and they have taken of the blood, and have put on the two side-posts, and on the lintel over the houses in which they eat it.

8 `And they have eaten the flesh in this night, roast with fire; with unleavened things and bitters they do eat it;