Compiled by Imam Muslim ibn al-Hajjaj
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 " .
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.