Muhammad bin Rmh bin al-Mhajr narrates from al-Laith bin Sad narrating from Yazid bin Abdullah bin Usama B. al-Haad narrating from Suhayl bin Abi Salah narrating from al-Numan bin Abi Ayyash narrating from Abu Said al-Khudri.

It was narrated from Abu Sa’eed Al-Khudri that the Messenger of Allah (ﷺ) said: “Whoever fasts one day in the cause of Allah, Allah will keep the Fire away from his face the distance of seventy autumns (years) for that day.”

حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحِ بْنِ الْمُهَاجِرِ، أَنْبَأَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنِ ابْنِ الْهَادِ، عَنْ سُهَيْلِ بْنِ أَبِي صَالِحٍ، عَنِ النُّعْمَانِ بْنِ أَبِي عَيَّاشٍ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏ "‏ مَنْ صَامَ يَوْمًا فِي سَبِيلِ اللَّهِ بَاعَدَ اللَّهُ بِذَلِكَ الْيَوْمِ النَّارَ عَنْ وَجْهِهِ سَبْعِينَ خَرِيفًا ‏"‏ ‏.‏