Exodus 24:13
13 So Moses rose with his assistant kJoshua, and Moses went up linto the mountain of God.
Exodus 32:17
17 When vJoshua heard the noise of the people as they shouted, he said to Moses, “There is a noise of war in the camp.”
Exodus 33:11
11 Thus dthe Lord used to speak to Moses face to face, as a man speaks to his friend. When Moses turned again into the camp, his eassistant Joshua the son of Nun, a young man, would not depart from the tent.