It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
"Whoever fasts one day for the sake of Allah, Allah will movehisface away from the Fire a distance of seventy autumns (years)." (FR)
English reference (FR): Vol. 1, Book 7, Hadith 1718 (FR)
Arabic reference (FR): Book 7, Hadith 1789 (FR)