Genesis 17:1
And when Abram was ninety years old and nine, the LORD appeared to Abram, and said to him, I am the Almighty God; walk before me, and be you perfect.
Torrey's Topical Textbook—AKJV

Exodus 6:3
And I appeared to Abraham, to Isaac, and to Jacob, by the name of God Almighty, but by my name JEHOVAH was I not known to them.
Torrey's Topical Textbook—AKJV