Musnad Ahmed: Hadith 2764

A Jewish woman gave the Messenger of Allah (ﷺ) some poisoned mutton. He sent word to her, asking: "What made you do what you did?" She said: I wanted, if you were a Prophet, that Allah would tell you about it, and if you were not a Prophet then I would have rid the people of you. When the Messenger of Allah (ﷺ) felt any pain because of that, he would be treated with cupping. On one occasion he travelled, and when he entered ihram, he felt some pain because of that and was treated with cupping.