In Jewish tradition, the giving of the law at Mount Sinai was attributed to an angel on account of the fact that Jews considered God to be too holy to meet with Moses himself on the mountain. Evidence of this way of thinking is also found elsewhere in the New Testament (see Acts 7:53; Galatians 3:19; Hebrews 2:2).1
38 This is the one who was in the congregation in the wilderness with the angel who spoke to him at Mount Sinai, and with our fathers. He received living oracles to give to us.