I heard the Prophet ﷺ saying, "Indeed, anyone who fasts for one day for Allah's Pleasure, Allah will keep his face away from the (Hell) fire for (a distance covered by a journey of) seventy years." (Using translation from Bukhārī 2840)

قَالَ رَسُولُ اللهِ ﷺ «مَنْ صَامَ يَوْمًا فِي سَبِيلِ اللهِ بَاعَدَ اللهُ وَجْهَهُ عَنِ النَّارِ سَبْعِينَ خَرِيفًا»