The Chapters on Expiation
11/6. Chapter:
Uttering the exception when swearing
Sunan Ibn Majah
حَدَّثَنَا الْعَبَّاسُ بْنُ عَبْدِ الْعَظِيمِ الْعَنْبَرِيُّ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَنْبَأَنَا مَعْمَرٌ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " مَنْ حَلَفَ فَقَالَ إِنْ شَاءَ اللَّهُ فَلَهُ ثُنْيَاهُ " .
It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said: 'Whoever swears an oath and says In sha' Allah, he will have made an exception."(2)
Reference : Sunan Ibn Majah 2104In-book reference : Book 11, Hadith 15English translation : Vol. 3, Book 11, Hadith 2104