(113) بَابُ مَعُونَةِ الرَّجُلِ أَخَاهُ
Abu Dharr reported that the Prophet, may Allah bless him and granthim peace, was asked, "What action is best?" He replied, "Belief in Allahand jihad in His way." He was asked, "Which slaves are best?" He replied,"The highest in price and most precious to their people." He said, "Whatdo you think I should do if I am unable to fight?" He replied, "Help someonein trouble or work for someone who does not work." He asked, "What do youthink that I should do if I am too weak (to act accordingly)?" He replied,"Spare people your evil. That is a sadaqa which you bestow on yourself."
Reference: Al-Adab Al-Mufrad 220
In-book reference: Book 10, Hadith 9
English translation: Book 10, Hadith 220