9 For this was how the promise was stated: “At the appointed time I will return, and Sarah will have a son.”a

Read Romans 9:9 Using Other Translations

For this is the word of promise, At this time will I come, and Sara shall have a son.
For this is what the promise said: "About this time next year I will return, and Sarah shall have a son."
For God had promised, “I will return about this time next year, and Sarah will have a son.”