Deuteronomy 33:2

And he said, The Lord came from Sinai, and rose up from Seir unto them; he shined forth from Mount Paran, and he came time ten thousands of saints. This is a description of the majesty and glory of God, as He appeared to Israel when He gave them the Law from Mount Sinai. While His majesty was concentrated on the summit of Sinai, the entire surrounding country reflected the wonderful light of His countenance. From Seir, the mountains of the Edomites on the east, to the cliffs of Paran in the west the entire wilderness glowed as at the rising of the sun. The Lord came forth from the midst, and was accompanied by myriads of angels, Acts 7:53; Hebrews 2:2; Galatians 3:19. From His right hand went a fiery Law for them, said of the fiery missiles of the bolts of lightning, as they emphasized the giving of the Law.