Messenger of Allah ﷺ said, "(The Prophet) Solomon once said, 'Tonight I will sleep with ninety women, each of whom will bring forth a (would-be) cavalier who will fight in Allah's Cause." On this, his companion said to him, "Say: Allah willing!" But he did not say Allah willing. Solomon then slept with all the women, but none of them became pregnant but one woman who later delivered a halfman. By Him in Whose Hand Muhammad's soul is, if he (Solomon) had said, 'Allah willing' (all his wives would have brought forth boys) and they would have fought in Allah's Cause as cavaliers. " (Using translation from Bukhārī 6639)  

عَنْ رَسُولِ اللهِ ﷺ قَالَ «وَقَالَ سُلَيْمَانُ بْنُ دَاوُدَ» لَأَطُوفَنَّ اللَّيْلَةَ عَلَى تِسْعِينَ امْرَأَةً كُلُّهُنَّ تَأْتِي بِفَارِسٍ يُجَاهِدُ فِي سَبِيلِ اللهِ فَقَالَ لَهُ صَاحِبُهُ قُلْ إِنْ شَاءَ اللهُ فَلَمْ يَقُلْ إِنْ شَاءَ اللهُ فَطَافَ عَلَيْهِنَّ جَمِيعًا فَلَمْ تَحْمِلْ مِنْهُنَّ إِلَّا امْرَأَةٌ وَاحِدَةٌ جَاءَتْ بِشِقِّ رَجُلٍ وَأَيْمُ الَّذِي نَفْسُ مُحَمَّدٍ بِيَدِهِ لَوْ قَالَ إِنْ شَاءَ اللهُ لَجَاهَدُوا فِي سَبِيلِ اللهِ فُرْسَانًا أَجْمَعُونَ