Exodus 17:10,12
So Joshua did as Moses had said to him, and fought with Amalek: and Moses, Aaron, and Hur went up to the top of the hill.
Nave's Topical Index—AKJV

Exodus 24:14
And he said to the elders, Tarry you here for us, until we come again to you: and, behold, Aaron and Hur are with you: if any man have any matters to do, let him come to them.
Nave's Topical Index—AKJV