Exodus 13:2

“Sanctify unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man and of beast: ...”

Exodus 13:12

“That thou shalt set apart unto the Lord all that openeth the matrix, and every firstling that cometh of a beast which th...”

Exodus 13:13

“And every firstling of an ass thou shalt redeem with a lamb; and if thou wilt not redeem it, then thou shalt break his n...”

Exodus 13:15

“And it came to pass, when Pharaoh would hardly let us go, that the Lord slew all the firstborn in the land of Egypt, bot...”

Exodus 34:19

“All that openeth the matrix is mine; and every firstling among thy cattle, whether ox or sheep, that is male.”