WHEN THE FIRE OF HELL IS DRIVEN AWAY H 1367 "When a worshiper of Allah observes the fast for a day for the Sake of Allah, He drives away from him the Fire a distance of seventy years of traveling." R 1367 Bukhari and Muslim with a chain up to Abu Sa'id Khudri who related that the Messenger of Allah, praise and peace be upon him, said this.
1339- وعن أَبي سعيد رضي الله عنه ، قَالَ : قَالَ رسول الله صلى الله عليه وآله وسلم : "مَا مِنْ عَبْدٍ يَصُومُ يَوْماً فِي سَبيلِ اللهِ إِلاَّ بَاعَدَ اللهُ بِذلِكَ اليَوْمِ وَجهَهُ عَنِ النَّارِ سَبْعِينَ خَرْيفاً" متفقٌ عَلَيْهِ .