Acts 7:38
He was in the assembly in the wilderness with the angel who spoke to him on Mount Sinai, and with our fathers. And he received living words to pass on to us.

Exodus 19:13
No hand shall touch him, but he shall surely be stoned or shot with arrows--whether man or beast, he must not live.' Only when the ram's horn sounds a long blast may they go up the mountain."

Exodus 19:16
On the third day, when morning came, there was thunder and lightning. A thick cloud was upon the mountain, with a very loud trumpet blast, so that all the people in the camp trembled.

Exodus 19:18
Mount Sinai was completely enveloped in smoke, because the LORD had descended on it in fire. And smoke rose like the smoke of a furnace, and the whole mountain quaked violently.