It is narrated from Sayyiduna Ka'b bin Malik (may Allah be pleased with him) that at Khaybar a Jewish woman presented a roasted goat as a gift to the Messenger of Allah (peace and blessings be upon him). He (peace and blessings be upon him) asked her: "What is this?" She said: It is a gift (she was wary of saying it was charity). So he (peace and blessings be upon him) ate, and his (peace and blessings be upon him) companions ate too. Then he (peace and blessings be upon him) said to them: "Stop." Then he said to the woman: "Did you poison this goat?" She said: Who told you? He (peace and blessings be upon him) said: "This bone" (pointing to its shank bone, or it was in his (peace and blessings be upon him) hand). She said: Yes. He (peace and blessings be upon him) asked: "Why?" She said: I thought that if you were a false prophet, people would be relieved of you, and if you were a true prophet, it would not harm you. So the Prophet (peace and blessings be upon him) had cupping done on the upper back (near the shoulder), and ordered his companions to have cupping done as well, so they had cupping done, but some of them died. Al-Zuhri said: "The woman accepted Islam, and then people mentioned that he (peace and blessings be upon him) had her killed."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16187