Acts 7:30-32
30 After 40 years had passed, an angel(a) appeared to him in the wilderness of Mount Sinai, in the flame of a burning bush.
31 When Moses saw it, he was amazed at the sight. As he was approaching to look at it, the voice of the Lord came:
32 I am the God of your fathers—the God of Abraham, of Isaac, and of Jacob.(A)(b) So Moses began to tremble and did not dare to look.