Exodus 3:14-15

14God said to Moses, “ I am who I am.”
Or   I am what I am, or   I will be what I will be
And he said, “Say this to the people of Israel b   I am has sent me to you.’”
15God also said to Moses, “Say this to the people of Israel, ‘The  Lord
The word  Lord, when spelled with capital letters, stands for the divine name, YHWH, which is here connected with the verb hayah, “to be” in verse 14
the d  God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has sent me to you.’ This is e  my name forever, and thus I am to be remembered throughout all generations.

Exodus 6:3

3I appeared to Abraham, to Isaac, and to Jacob, as f  God Almighty,
Hebrew El Shaddai
but by my name the h   Lord I did not make myself known to them.
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