[Machine] The Messenger of Allah ﷺ said, "Whoever takes an oath and says 'Insha'Allah' (if Allah wills), then he will have two rewards: one for fulfilling the oath and another for the expression of 'Insha'Allah'. This is narrated from the first of the benefits of Abu 'Amr bin Hamdan, Ayoub bin Musa, and likewise it is narrated from Ibn Wahb, from Sufyan, from Ayoub bin Musa. Indeed, this hadith is only known as marfu' (attributed to the Prophet) from the hadith of Ayoub al-Sakhityani."  

قَالَ رَسُولُ اللهِ ﷺ مَنْ حَلَفَ فَقَالَ إِنْ شَاءَ اللهُ فَلَهُ ثُنْيَا كَذَا وَجَدْتُهُ وَهُوَ فِي الْأَوَّلِ مِنْ فَوَائِدِ أَبِي عَمْرِو بْنِ حَمْدَانَ أَيُّوبَ بْنِ مُوسَى وَكَذَلِكَ رُوِيَ عَنِ ابْنِ وَهْبٍ عَنْ سُفْيَانَ عَنْ أَيُّوبَ بْنِ مُوسَى وَإِنَّمَا يُعْرَفُ هَذَا الْحَدِيثُ مَرْفُوعًا مِنْ حَدِيثِ أَيُّوبَ السَّخْتِيَانِيِّ