Romans 4:18

¹⁸ who, contrary to hope, in hope believed, so that he became the father of many nations, according to what was spoken, “So shall your descendants be.”

against hope — an oxymoron, beyond hope. Abraham had hope contrary to human expectation.

So shall thy seed be — referring to stars. And He brought him forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and He said unto him, So shall thy seed be (Genesis 15:5).