Exodus 7:15

7:15 Go to Pharaoh in the morning when he goes out to the water. Position yourself to meet him by the edge of the Nile, and take in your hand the staff that was turned into a snake.

Exodus 33:9

33:9 And whenever Moses entered the tent, the pillar of cloud would descend and stand at the entrance of the tent, and the Lord would speak with Moses.