Exodus 12:5-7

ISV(i) 5 Your lamb is to be a year old male without blemish. You may take it from the sheep or from the goats. 6 It is to remain under your care until the fourteenth day of this month, and then the entire assembly of the congregation of Israel is to slaughter it at twilight. 7 They’re to take some of the blood and put it on the two doorposts and on the lintel of the houses where they eat the lamb.