Exodus 12:5

5Your lamb shall be awithout blemish, a male a year old. You may take it from the sheep or from the goats,

Leviticus 12:6

6 b“And when the days of her purifying are completed, whether for a son or for a daughter, she shall bring to the priest at the entrance of the tent of meeting a lamb a year old for a burnt offering, and a pigeon or a turtledove for a sin offering,

Leviticus 14:10

10“And on the eighth day he cshall take two male lambs without blemish, and one ewe lamb a year old without blemish, and a dgrain offering of three tenths of an ephah
An  ephah was about 3/5 bushel or 22 liters
of fine flour mixed with oil, and one log
A  log was about 1/3 quart or 0.3 liter
of oil.

Leviticus 23:12

12And on the day when you gwave the sheaf, you shall offer a hmale lamb a year old without blemish as a burnt offering to the Lord.
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