I appeared to Abraham, to Isaac, and to Jacob, as God Almighty, but by My name LORD I was not known to them.
Exodus 6:3
Surrounding context
6:2 And God spoke to Moses and said to him: "I am the LORD.
6:3 I appeared to Abraham, to Isaac, and to Jacob, as God Almighty, but by My name LORD I was not known to them.
6:4 I have also established My covenant with them, to give them the land of Canaan, the land of their pilgrimage, in which they were strangers.