Exodus 19:9

“that they may believe that Yahweh, the God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has appeared to you.”

So the people believed; and they heard that Yahweh cared about the sons of Israel and that He had seen their affliction. So they bowed low and worshiped.

Then Israel saw the great hand which Yahweh had used against the Egyptians; and the people feared Yahweh, and they believed in Yahweh and in His servant Moses.

Then Moses went up to the mountain, and the cloud covered the mountain.

Then Yahweh descended in the cloud and stood there with him, and He called upon the name of Yahweh.

Then Yahweh came down in a pillar of cloud and stood at the doorway of the tent, and He called Aaron and Miriam. And then both came forward,

“Out of the heavens He caused you to hear His voice to discipline you; and on earth He caused you to see His great fire, and you heard His words from the midst of the fire.

Clouds and thick darkness are all around Him; Righteousness and justice are the foundation of His throne.