Exodus 3:15

Overview - Exodus 3
Moses keeps Jethro's flock.
God appears to him in a burning bush.
He sends him to deliver Israel.
13 The name of God.
15 His message to Israel, and Pharaoh, whose opposition is foretold.
20 He is assured of Israel's deliverance.
Treasury of Scripture Knowledge

Exodus 3:15  (King James Version)
And God said moreover unto Moses, Thus shalt thou say unto the children of Israel, The LORD God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me unto you: this is my name for ever, and this is my memorial unto all generations.

The Lord
6 ; 4:5 Genesis 17:7 Genesis 17:8 ; Deuteronomy 1:11 Deuteronomy 1:35 ; 4:1 2 Chronicles 28:9 ; Matthew 22:32 ; Acts 7:32

this is my name for ever
The name here referred to is that which immediately precedes, [yhwh,] ,] {Yehowah,} which we
translate "Lord", the name by which God had been known from the creation of the world, ( Genesis 2:2, ,)and by which he is known to the present day. [yhwh,] {Yehowah,} from [hwh,] {hawah,} to be, subsist, signifies
"He who is", or "subsists", ie., eminently and in a manner
superior to all other beings; and is essentially the same with [ahwh,] {eheyeh,} "I AM", in the preceding verse. Psalms 72:17 Psalms 72:19 ; 135:13 Psalms 145:1 Psalms 145:2 Isaiah 9:6 ; 63:12

my memorial
Psalms 102:12 ; Hosea 12:5 ; Micah 4:5 ; Malachi 3:6 ; Hebrews 13:8