Hadith 2905
Sayyiduna Abu Hurairah (may Allah be pleased with him) and Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrate this statement of the Prophet Muhammad (peace and blessings be upon him): "Whatever trouble, worry, sorrow, pain, grief, or harm befalls a believing servant—even if a thorn pricks him—Allah Almighty, because of that, wipes out some of his sins."