וַיֹּ֣אמֶר אַבְרָ֔ם הֵ֣ן לִ֔י לֹ֥א נָתַ֖תָּה זָ֑רַע וְהִנֵּ֥ה בֶן־בֵּיתִ֖י יוֹרֵ֥שׁ אֹתִֽי׃
And Abram said: ‘Behold, to me Thou hast given no seed, and, lo, one born in my house is to be mine heir.’
Targum Jonathan on Genesis
And Abram said, Behold, to me Thou hast not given a son; and, behold, the manager of my house will be my heir.