Exodus 12:5

5 Your ¹lamb shall be ^aa male, without blemish, a year old; you may take it from the sheep or from the goats.

Leviticus 1:3

3 If his offering is a ^aburnt offering from the herd, he shall bring it near, a male ^bwithout blemish; he shall bring it near ^cto the doorway of the tent of meeting, that he may be accepted before Yahweh.