Genesis 15:3

And Abram said, 'You have given me no children; so a servant in my household will be my heir.'

(New International Version)

And Abram said, 'Since You have given no offspring to me, one born in my house is my heir.'

(New American Standard Bible)

And Abram said, Behold, to me thou hast given no seed: and, lo, one born in my house is mine heir.

(King James Version)