Genesis 22:15-17

Young's Literal Translation

¹⁵ And the messenger of Jehovah calleth unto Abraham a second time from the heavens,

¹⁶ and saith, `By Myself I have sworn -- the affirmation of Jehovah -- that because thou hast done this thing, and hast not withheld thy son, thine only one --

¹⁷ that blessing I bless thee, and multiplying I multiply thy seed as stars of the heavens, and as sand which [is] on the sea-shore; and thy seed doth possess the gate of his enemies;