'Law of the Lord' in the Bible

As it is written in the law of the Lord, "Every man child that first openeth the matrix, shall be called holy to the Lord":

and to offer, as it is said in the law of the Lord, "A pair of turtle doves, or two young pigeons."

And as soon as they had performed all things according to the law of the Lord, they returned into Galilee to their own city, Nazareth.