Exodus 19:19
18 Now Mount Sinai was completely covered with smoke because the Lord had descended on it in fire, and its smoke went up like the smoke of a great furnace, and the whole mountain shook violently. 19 When the sound of the horn grew louder and louder, Moses was speaking and God was answering him with a voice. 20 The Lord came down on Mount Sinai, on the top of the mountain, and the Lord summoned Moses to the top of the mountain, and Moses went up.
Oneklos Exodus 19:19
18 And the mountain of Sinai was altogether fuming from before the revelation of the Lord upon it in fire; and the smoke went up as the smoke of a furnace, and the whole mount trembled greatly. 19 But when the voice of the trumpet went forth and became exceedingly strong, Mosheh spake, and from the presence of the Lord he was answered by a voice. 20 And the Lord was revealed upon mount Sinai, on the head of the mountain; and the Lord called Mosheh unto the head of the mount; and Mosheh went up.
Notes and References
"... With this awkward translation, Onkelos avoids the biblical anthropomorphism "and God answered him with a voice." The Mekhilta suggests the meaning of the verse to be that God responded to Moses by providing him with a voice strong enough to be heard by the people of Israel when Moses recited the last eight of the Ten Commandments. According to the Babylonian Talmud (Makkot 24a) it was only the first two commandments that the Israelites heard directly from God ... The targumist changes the biblical 'the Lord descended,' as in verse 18. His translation conforms to the statement in verse 20:19 that God spoke 'from heaven' and not from the mountain. Ihe Babylonian Talmud (Sukkah 5a) confirms that God did not descend to the mountain. In order to reconcile the two conflicting verses, the Mekhilta midrashically and anthropomorphically describes how God's 'throne of glory' descended upon the mountain (while God remained in the heaven) ..."
Drazin, Israel, and Stanley M. Wagner Onkelos on the Torah, Exodus: Understanding the Bible Text (p. 121) Gefen, 2006