Leviticus 12:6

12:6 “‘When the days of her purification are completed for a son or for a daughter, she must bring a one year old lamb for a burnt offering and a young pigeon or turtledove for a sin offering to the entrance of the Meeting Tent, to the priest.

Leviticus 14:10

The Eighth Day Atonement Rituals

14:10 “On the eighth day he must take two flawless male lambs, one flawless yearling female lamb, three-tenths of an ephah of choice wheat flour as a grain offering mixed with olive oil, and one log of olive oil,

Leviticus 23:12

23:12 On the day you wave the sheaf you must also offer a flawless yearling lamb for a burnt offering to the Lord,

Exodus 12:5

12:5 Your lamb must be perfect, a male, one year old; you may take it from the sheep or from the goats.