Musnad Ahmad 25:925

Surayj narrated to us, 'Abbad narrated to us, from Hilal, from 'Ikrimah, from Ibn 'Abbas: That a woman from the Jews gifted a poisoned sheep to the Messenger of Allah, may Allah bless him and grant him peace. So he sent for her and said, "What prompted you to do what you did?" She said, "I loved—or I intended—that if you were a prophet, Allah would inform you of it, and if you were not a prophet, I would rid the people of you." He said: And the Messenger of Allah, may Allah bless him and grant him peace, "whenever he felt anything of that, he would perform cupping." He said: "He traveled once, and when he entered into the state of Ihram, he felt something of that, so he performed cupping."