'Law of the Lord' in the Bible

Now when the period of their purification ended, in accordance with the law of Moses, they took Him up to Jerusalem to present Him to the Lord, to do as it is written in the law of the Lord,

and to offer the sacrifice in accordance with what is specified in the law of the Lord, a pair of turtle-doves or two young pigeons."

Now when they had completed everything that was in accordance with the law of the Lord, they returned to Galilee, to their own town of Nazareth.