Shemot 19:17-19 Orthodox Jewish Bible (OJB)
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.