Exodus 4:5 in the King James Version
That they may believe that the LORD God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath appeared unto thee.
Context
4 The LORD said to Moses, “Stretch out your hand, and take it by the tail.” He stretched out his hand, and took hold of it, and it became a rod in his hand.
5 “This is so that they may believe that the LORD, the God of their fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has appeared to you.”
6 The LORD said furthermore to him, “Now put your hand inside your cloak.” He put his hand inside his cloak, and when he took it out, behold, his hand was leprous, as white as snow.