(as it is written in the Law of the Lord, "Every firstborn male is to be consecrated to the Lord"), (NIV)
As it is written in the Law of the Lord, Every [firstborn] male that opens the womb shall be set apart and dedicated and called holy to the Lord--[Exod. 13:1, 2, 12; Num. 8:17.] (AMP)
(As it is written in the law of the LORD, Every male that openeth the womb shall be called holy to the Lord;) (KJV)