The LORD spoke again to Moses and Aaron, telling them,
Now that Aaron was consecrated a high priest over the house of God, God spoke to him with Moses, and appointed them both as joint-commissioners to deliver his will to the people. He spoke both to Moses and to Aaron about this matter; for it was particularly required of the priests that they should put a difference between clean and unclean, and teach the people to do so.
Commenting on Leviticus 11:1-8
And the Lord spake unto Moses, and unto Aaron,.... The one being the chief magistrate, and the other the high priest, and both concerned to see the following laws put into execution; according to Jarchi, the Lord spoke to Moses that he might speak to Aaron; but being now in office, and one part of his office being to distinguish between clean and unclean, the...
And when Moses heard [that], he was content. (h) Moses bore with his infirmity, considering his great sorrow, but does not leave an example to forgive them that maliciously transgress the commandment of God.