And the LORD said to Aaron, Go into the wilderness to meet Moses. And he went, and met him in the mount of God, and kissed him.
The Lord said to Aaron, Go into the wilderness to meet Moses. The wilderness was not anciently in the state of desolation and dreary solitude which it now exhibits, otherwise journeys could not have been made by individuals unattended. (See Laborde, 'Commentaire Geographique.)
And he went, and met him in the mount of God - (see the note at Exodus 3:1.)
And kissed him. After a separation of 40 years, their meeting would be mutually happy. Similar are the salutations of Arab friends when they meet in the desert still. Conspicuous is the kiss on each side of the head.