New Living Translation
But my covenant will be confirmed with Isaac, who will be born to you and Sarah about this time next year.”

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

Berean Study Bible
But I will establish My covenant with Isaac, whom Sarah will bear to you at this time next year.”

Douay-Rheims Bible
But my covenant I will establish with Isaac, whom Sara shall bring forth to thee at this time in the next year.

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

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

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

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

Genesis 17:21 Additional Translations ...