Musnad Ahmad Hadith 19667

It is narrated from Abu Musa (may Allah be pleased with him) that when a beggar would come to the Noble Prophet (ﷺ), the Noble Prophet (ﷺ) would say to the people: "Intercede for him, you will be rewarded, and Allah will decree through the tongue of His Prophet (ﷺ) whatever He wills." And he said: "A Muslim is like a building for another Muslim, one part of which strengthens the other." And the trustworthy treasurer is the one who, when he is commanded regarding something, fulfills it completely, perfectly, and with a happy heart, so that what the donors have ordered to be given reaches those for whom it is intended.