Salaryman had sixty wives and he said: I will visit each one of them every night, and every one of them will become pregnant and give birth to a male child who will be a horseman and fight in the cause of Allah. But (it so happened) that none of them became pregnant except one, but she gave birth to an incomplete child. Thereupon Messenger of Allah ﷺ said: Had he said Insha' Allah (if God so wills), then every one of them would have given birth to a child who would have been a horseman and fought in the cause of Allah
كَانَ لِسُلَيْمَانَ سِتُّونَ امْرَأَةً فَقَالَ لأَطُوفَنَّ عَلَيْهِنَّ اللَّيْلَةَ فَتَحْمِلُ كُلُّ وَاحِدَةٍ مِنْهُنَّ فَتَلِدُ كُلُّ وَاحِدَةٍ مِنْهُنَّ غُلاَمًا فَارِسًا يُقَاتِلُ فِي سَبِيلِ اللَّهِ فَلَمْ تَحْمِلْ مِنْهُنَّ إِلاَّ وَاحِدَةٌ فَوَلَدَتْ نِصْفَ إِنْسَانٍ فَقَالَ رَسُولُ اللَّهِ ﷺ لَوْ كَانَ اسْتَثْنَى لَوَلَدَتْ كُلُّ وَاحِدَةٍ مِنْهُنَّ غُلاَمًا فَارِسًا يُقَاتِلُ فِي سَبِيلِ اللَّهِ