Deuteronomy 33:2
1 This is the blessing Moses the man of God pronounced upon the Israelites before his death. 2 He said: “The Lord came from Sinai and revealed himself to Israel from Seir. He appeared in splendor from Mount Paran, and came forth with ten thousand holy ones. With his right hand he gave a fiery law to them. 3 Surely he loves the people; all your holy ones are in your power. And they sit at your feet, each receiving your words. 4 Moses delivered to us a law, an inheritance for the assembly of Jacob.
1 Enoch 1:4
2 He began his parable and said, Enoch, a righteous man, whose eyes were opened by God, saw the vision of the Holy One in the heavens, shown to him by the angels. He heard everything from them, and from them he understood what he saw, not for his own generation, but for a distant one yet to come. 3 Regarding the chosen, he spoke and taught about them: The Holy Great One will emerge from His dwelling, 4 And the eternal God will walk upon the earth, even on Mount Sinai, and appear from His camp and reveal His might from the heavens above. 5 Everyone will be struck with fear and the Watchers will tremble, and great fear and trembling will grip them to the ends of the earth.
Notes and References
"... The wording here alludes to several Old Testament passages where Yahweh/the Holy One “comes from” Sinai (or its environs), his dwelling place, as a divine warrior (Deuteronomy 33:2; Habakkuk 3:3; Psalm 68:7–8; Judges 5:4–5; cp. Micah 1:3; Isaiah 26:21; Jeremiah 25:30). The author is drawing on this “warrior from Sinai” tradition to convey the idea that God is going to descend from heaven to return to earth “on” Mount Sinai to exact punishment on the wicked. The wording evokes the divine warrior motif ..."
Heiser, Michael S. A Companion to the Book of Enoch: A Reader’s Commentary, Vol. 1 (p. 53) Defender Publishing, 2019