Acts 7:33

30 At the end of forty years, an angel came to him in the waste land of Sinai, in the flame of a burning thorn-tree.

31 And Moses, seeing it, was full of wonder, and when he came up to have a nearer view of it, the voice of the Lord came to him, saying,

32 I am the God of your fathers, the God of Abraham and of Isaac and of Jacob. And Moses, shaking with fear, kept his eyes from looking at it.

33 And the Lord said, Take off the shoes from your feet, for the place where you are is holy.

34 Truly, I have seen the sorrows of my people in Egypt, and their cries have come to my ears, and I have come down to make them free: and now, come, I will send you to Egypt.

35 This Moses, whom they would not have, saying, Who made you a ruler and a judge? him God sent to be a ruler and a saviour, by the hand of the angel whom he saw in the thorn-tree.

36 This man took them out, having done wonders and signs in Egypt and in the Red Sea and in the waste land, for forty years.