Cross reference
1 Samuel 13:1
1 Saul was `forty' years old when he began to reign; and when he had reigned two years over Israel,
Exodus 12:5
5 Your lamb shall be without blemish, a male a year old: ye shall take it from the sheep, or from the goats:
Micah 6:6
6 Wherewith shall I come before Jehovah, and bow myself before the high God? shall I come before him with burnt-offerings, with calves a year old?