Shemot 19:17-19

Orthodox Jewish Bible

¹⁷ And Moshe led HaAm forth out of the machaneh to encounter HaElohim; and they stood at the foot of HaHar.

¹⁸ And Mt. Sinai was altogether smoking, because Hashem descended upon it in eish; and the smoke thereof ascended as the smoke of the furnace, and kol HaHar shook violently.

¹⁹ And when the sound of the shofar was moving [closer], and grew louder and louder, Moshe spoke, and HaElohim answered him in thunder.