Exodus 12:5-7

New International Version - UK

⁵ The animals you choose must be year-old males without defect, and you may take them from the sheep or the goats. ⁶ Take care of them until the fourteenth day of the month, when all the members of the community of Israel must slaughter them at twilight. ⁷ Then they are to take some of the blood and put it on the sides and tops of the door-frames of the houses where they eat the lambs.