Riyad as-Salihin, Book 1, Hadith 265 (In-Book) ⓘ

Abu Hurairah (May Allah be pleased with him) reported: The Prophet said, "One who strives to help the widows and the poor is like the one who fights in the way of Allah." The narrator said: I think that he added also: "I shall regard him as the one who stands up (for prayer) without rest and as the one who observes fasts continuously".[Al-Bukhari and Muslim].

وعنه عن النبي صلى الله عليه وسلم‏:‏ ‏"‏ الساعي على الأرملة والمسكين كالمجاهد في سبيل الله‏"‏ وأحسبه قال‏:‏ ‏"‏ وكالقائم الذي لا يفتر، وكالصائم الذي لا يفطر‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏