Deuteronomy 4:11-13 New Revised Standard Version (NRSV)
11 you approached and stood at the foot of the mountain while the mountain was blazing up to the very heavens, shrouded in dark clouds. 12 Then the Lord spoke to you out of the fire. You heard the sound of words but saw no form; there was only a voice. 13 He declared to you his covenant, which he charged you to observe, that is, the ten commandments;[a] and he wrote them on two stone tablets.