Saying: "If Allah wills" when swearing oaths and at other times

Abu Huraira reported that (Prophet) Sulaiman had sixty wives. He (one day) 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

حَدَّثَنِي أَبُو الرَّبِيعِ الْعَتَكِيُّ، وَأَبُو كَامِلٍ الْجَحْدَرِيُّ فُضَيْلُ بْنُ حُسَيْنٍ - وَاللَّفْظُ لأَبِي الرَّبِيعِ - قَالاَ حَدَّثَنَا حَمَّادٌ، - وَهُوَ ابْنُ زَيْدٍ - حَدَّثَنَا أَيُّوبُ، عَنْ مُحَمَّدٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ 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 " .

Abu Huraira reported Allah's Prophet ﷺ as saying that Sulaiman b. Dawud, the Apostle of Allah, observed: I will have an intercourse with seventy wives during the night;
all of them will give birth to a male child who will fight in the cause of Allah. His companion or the ang I said to him: Say," If God wills." But he (Hadrat Sulaimin) did not say so, and he forgot it. And none of his wives gave birth to a child, but one who gave birth to a premature child. Messenger of Allah ﷺ said: Had he said Insha' Allah (if God so will). he would not have failed and his desire would have been materialised.

وَحَدَّثَنَا مُحَمَّدُ بْنُ عَبَّادٍ، وَابْنُ أَبِي عُمَرَ، - وَاللَّفْظُ لاِبْنِ أَبِي عُمَرَ - قَالاَ حَدَّثَنَا سُفْيَانُ، عَنْ هِشَامِ بْنِ حُجَيْرٍ، عَنْ طَاوُسٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ ﷺ قَالَ " قَالَ سُلَيْمَانُ بْنُ دَاوُدَ نَبِيُّ اللَّهِ لأَطُوفَنَّ اللَّيْلَةَ عَلَى سَبْعِينَ امْرَأَةً كُلُّهُنَّ تَأْتِي بِغُلاَمٍ يُقَاتِلُ فِي سَبِيلِ اللَّهِ . فَقَالَ لَهُ صَاحِبُهُ أَوِ الْمَلَكُ قُلْ إِنْ شَاءَ اللَّهُ . فَلَمْ يَقُلْ وَنَسِيَ . فَلَمْ تَأْتِ وَاحِدَةٌ مِنْ نِسَائِهِ إِلاَّ وَاحِدَةٌ جَاءَتْ بِشِقِّ غُلاَمٍ " . فَقَالَ رَسُولُ اللَّهِ ﷺ " وَلَوْ قَالَ إِنْ شَاءَ اللَّهُ . لَمْ يَحْنَثْ وَكَانَ دَرَكًا لَهُ فِي حَاجَتِهِ " .

Abu Huraira reported this hadith from the Apostle of Allah ﷺ through another chain of transmitters.

وَحَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ ﷺ مِثْلَهُ أَوْ نَحْوَهُ .

Abu Huraira reported that Sulaiman b. Dawud said: I will certainly have intercourse with seventy wives during the night, and every wife amongst them will give birth to a child, who will fight in the cause of Allah. It was said to him: Say:" Insha' Allah" (God willing), but he did not say so and forgot it. He went round them but none of them give birth to a child except one woman and that too was an incomplete person. Upon this Messenger of Allah ﷺ said: If he had said" Insha' Allah." he would not have failed, and his desire must have been fulfilled.

وَحَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ بْنُ هَمَّامٍ، أَخْبَرَنَا مَعْمَرٌ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ سُلَيْمَانُ بْنُ دَاوُدَ لأُطِيفَنَّ اللَّيْلَةَ عَلَى سَبْعِينَ امْرَأَةً تَلِدُ كُلُّ امْرَأَةٍ مِنْهُنَّ غُلاَمًا يُقَاتِلُ فِي سَبِيلِ اللَّهِ . فَقِيلَ لَهُ قُلْ إِنْ شَاءَ اللَّهُ . فَلَمْ يَقُلْ . فَأَطَافَ بِهِنَّ فَلَمْ تَلِدْ مِنْهُنَّ إِلاَّ امْرَأَةٌ وَاحِدَةٌ نِصْفَ إِنْسَانٍ . قَالَ فَقَالَ رَسُولُ اللَّهِ ﷺ " لَوْ قَالَ إِنْ شَاءَ اللَّهُ . لَمْ يَحْنَثْ وَكَانَ دَرَكًا لِحَاجَتِهِ " .