He reported God's messenger as telling that Solomon said, "I shall to-night visit ninety women
(a version has a hundred) all of whom will give birth to a horseman who will fight in God's path." The angel told him to say, "If God will," but he forgot and did not say it. He visited them and none of them bore a child except one of them who gave birth to half a man. He added, "By Him in whose hand Muhammad's soul is, if he had said, `If God will,' they would all have striven as horsemen in God's path."
(Bukhari and Muslim.)