Exodus 6:1-3

EJ2000(i) 1 ¶ Then the LORD said unto Moses, Now thou shalt see what I will do to Pharaoh; for with a strong hand he must let them go, and with a strong hand he shall drive them out of his land. 2 And God spoke unto Moses and said unto him, I am the LORD; 3 and I appeared unto Abraham, unto Isaac, and unto Jacob, as God Almighty, but by my name the LORD (YHWH) I was not known to them.