Acts 7:38; Hebrews 12:25

38 This is the man who was in the assembly in the wilderness, accompanied by the angel that had spoken to him at Mount Sinai and by our fathers, the man who was given living words to pass on to us.

25 See that you don't reject the One speaking! For if those did not escape who rejected him when he gave divine warning on earth, think how much less we will escape if we turn away from him when he warns from heaven.