God: Appearances of To Moses, at Sinai
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Exodus 19:16–24
On the third day, when morning came, there was thunder and lightning. A thick cloud was upon the mountain, and a very loud blast of the ram’s horn went out, so that all the people in the camp trembled. / Then Moses brought the people out of the camp to meet with God, and they stood at the foot of the mountain. / Mount Sinai was completely enveloped in smoke, because the LORD had descended on it in fire. And the smoke rose like the smoke of a furnace, and the whole mountain quaked violently.
Exodus 24:10
and they saw the God of Israel. Under His feet was a work like a pavement made of sapphire, as clear as the sky itself.