Acts 7:30-33 And when forty years were expired, there appeared to him in the wilderness of mount Sina an angel of the Lord in a flame of fire in a bush.

KJV_Cambridge⁽ⁱ⁾ ³⁰ And when forty years were expired, there appeared to him in the wilderness of mount Sina an angel of the Lord in a flame of fire in a bush. ³¹ When Moses saw it, he wondered at the sight: and as he drew near to behold it, the voice of the Lord came unto him, ³² Saying, I am the God of thy fathers, the God of Abraham, and the God of Isaac, and the God of Jacob. Then Moses trembled, and durst not behold. ³³ Then said the Lord to him, Put off thy shoes from thy feet: for the place where thou standest is holy ground.