Leviticus 4:32

4:32 “‘But if he brings a sheep as his offering, for a sin offering, he must bring a flawless female.

Numbers 6:14

6:14 and he must present his offering to the Lord: one male lamb in its first year without blemish for a burnt offering, one ewe lamb in its first year without blemish for a purification offering, one ram without blemish for a peace offering,