NASB 1995
"But My covenant I will establish with Isaac, whom Sarah will bear to you at this season 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 ...