Exodus 19:9
The LORD said to Moses, "Behold, I will come to you in a dense cloud, so that the people will hear when I speak with you, and they will always put their trust in you." And Moses relayed the words of the people to the LORD.

Exodus 34:5
And the LORD descended in a cloud, stood with him there, and proclaimed His name, the LORD.

Numbers 11:25
Then the LORD came down in the cloud and spoke to him, and He took some of the Spirit that was on Moses and placed that Spirit on the seventy elders. As the Spirit rested on them, they prophesied--but they never did so again.

Numbers 12:4
And suddenly the LORD said to Moses, Aaron, and Miriam, "You three, come out to the Tent of Meeting." So the three went out,

Psalm 99:7
He spoke to them in a pillar of cloud; they kept His decrees and the statutes He gave them.