Exodus 4:10

4:10 Then Moses said to the Lord, “O my Lord, I am not an eloquent man, neither in the past nor since you have spoken to your servant, for I am slow of speech and slow of tongue.”

Exodus 14:31

14:31 When Israel saw the great power that the Lord had exercised over the Egyptians, they feared the Lord, and they believed in the Lord and in his servant Moses.

Exodus 33:11

33:11 The Lord would speak to Moses face to face, the way a person speaks to a friend. Then Moses would return to the camp, but his servant, Joshua son of Nun, a young man, did not leave the tent.