Exodus 3:14

He said, "Certainly I will be with you. This will be the token to you, that I have sent you: when you have brought forth the people out of Egypt, you shall serve God on this mountain.

Moses said to God, "Behold, when I come to the children of Israel, and tell them, 'The God of your fathers has sent me to you;' and they ask me, 'What is his name?' What should I tell them?

God said moreover to Moses, "You shall tell the children of Israel this, 'Yahweh, the God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has sent me to you.' This is my name forever, and this is my memorial to all generations.

Go, and gather the elders of Israel together, and tell them, 'Yahweh, the God of your fathers, the God of Abraham, of Isaac, and of Jacob, has appeared to me, saying, "I have surely visited you, and seen that which is done to you in Egypt;