Deuteronomy 5:4

The Lord talked with you face to face in the mount,.... Meaning, not in that free, friendly, and familiar manner, in which he sometimes talked with Moses, of whom this phrase is used, Exodus 33:11, but publicly, audibly, clearly, and distinctly, or without the interposition of another; he did not speak to them by Moses, but to them themselves; he talked to them without a middle person between them, as Aben Ezra expresses it: without making use of one to relate to them what he said; but he talked to them directly, personally:

out of the midst of the fire; in which he descended, and with which the mountain was burning all the time he was speaking; which made it very awful and terrible, and pointed at the terrors of the legal dispensation.