Silsilat al-Ahadith al-Sahihah

Lady Aisha Siddiqa (may Allah be pleased with her) says that two men came to the Messenger of Allah (peace and blessings be upon him), and they spoke to him about something which I could not understand. The Prophet (peace and blessings be upon him) became angry and cursed them. When they left, I said (sarcastically): O Messenger of Allah! The good that has come to those poor fellows, surely no one else has received such good in their favor? He asked: "How is that?" I said: You cursed and abused them (this is their misfortune). The Prophet (peace and blessings be upon him) said: "Do you not know about the condition I have set with my Lord? I said: O Allah! I am only a human being. If I curse or abuse any Muslim, then make that a means of purification and reward for him."