1 Saul was thirty years old when he became king. He was king of Israel forty-two years.
1 Samuel 13:1 Cross References - NSB
Exodus 12:5
5 »‘Your animal must be a one-year-old male that has no defects. You may choose a lamb or a young goat.
Micah 6:6
6 With what shall I come before Jehovah? Shall I bow down before the high God? Shall I come before him with burnt offerings, with year old calves?