Acts 7:30-34

30 And when forty years had passed, an Angel of the Lord appeared to him in a flame of fire in a bush, in the wilderness of Mount Sinai. 31 When Moses saw it, he marveled at the sight; and as he drew near to observe, the voice of the Lord came to him, 32 saying, 'I am the God of your fathers--the God of Abraham, the God of Isaac, and the God of Jacob.' And Moses trembled and dared not look. 33 'Then the Lord said to him, "Take your sandals off your feet, for the place where you stand is holy ground. 34 I have surely seen the oppression of my people who are in Egypt; I have heard their groaning and have come down to deliver them. And now come, I will send you to Egypt." '