Exodus 12:3, 5-6

Tell all the congregation of Israel, ‘On the tenth [day] of this month they are to take a lamb or young goat for themselves, according to [the size of] the household of which he is the father, a lamb or young goat for each household.

Your lamb or young goat shall be [perfect] without blemish or bodily defect, a male a year old; you may take it from the sheep or from the goats. [1 Pet 1:19, 20] You shall keep it until the fourteenth day of the same month, then the whole assembly of the congregation of Israel is to slaughter it at twilight.