Genesis 17:21

But my covenant will I establish with Isaac, which Sarah shall bear unto thee at this set time in the next year.
— Genesis 17:21, King James Version

In other translations

World English Bible (WEB)

But my covenant I establish with Isaac, whom Sarah will bear to you at this set time in the next year."

American Standard Version (ASV)

But my covenant will I establish with Isaac, whom Sarah shall bear unto thee at this set time in the next year.

Young's Literal Translation (YLT)

and My covenant I establish with Isaac, whom Sarah doth bear to thee at this appointed time in the next year;'