Sahih Muslim #7468 · The Book of Zuhd and Softening of Hearts

Sahih MuslimAbu Huraira reported that Allah's Messenger
Sahih Muslim · Book 55 · The Book of Zuhd and Softening of Hearts
Sahih Muslim · كتاب 55 · كتاب الزهد
One who makes efforts (for earning to be spent) on a widow and the destitute is like a striver in the cause of Allah, and I think he also said: He is like one who constantly stands for prayer and observes fast without breaking it.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، حَدَّثَنَا مَالِكٌ، عَنْ ثَوْرِ بْنِ زَيْدٍ، عَنْ أَبِي الْغَيْثِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏
"‏ السَّاعِي عَلَى الأَرْمَلَةِ وَالْمِسْكِينِ كَالْمُجَاهِدِ فِي سَبِيلِ اللَّهِ - وَأَحْسِبُهُ قَالَ - وَكَالْقَائِمِ لاَ يَفْتُرُ وَكَالصَّائِمِ لاَ يُفْطِرُ ‏"‏ ‏.‏
Reference : Sahih Muslim 7468In-book reference : Book 55, Hadith 51