Acts 7:30-34

30 "Now when forty years had passed, an angel 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; and as he approached to look, there came the voice of the Lord:
32 "I am the God of your ancestors, the God of Abraham, Isaac, and Jacob.' Moses began to tremble and did not dare to look.
33 Then the Lord said to him, "Take off the sandals from your feet, for the place where you are standing is holy ground.
34 I have surely seen the mistreatment of my people who are in Egypt and have heard their groaning, and I have come down to rescue them. Come now, I will send you to Egypt.'
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.