Abu Dawud Book 34, Hadith Number 4495.
Narated By Jabir ibn Abdullah : Ibn Shihab said: Jabir ibn Abdullah used to say that a Jewess from the inhabitants of Khaybar poisoned a roasted sheep and presented it to the Apostle of Allah (PBUH) who took its foreleg and ate from it. A group of his companions also ate with him.
The Apostle of Allah (PBUH) then said: Take your hands away (from the food). The Apostle of Allah (PBUH) then sent someone to the Jewess and he called her.
He said to her: Have you poisoned this sheep? The Jewess replied: Who has informed you? He said: This foreleg which I have in my hand has informed me. She said: Yes. He said: What did you intend by it? She said: I thought if you were a prophet, it would not harm you; if you were not a prophet, we should rid ourselves of him (i.e. the Prophet). The Apostle of Allah (PBUH) then forgave her, and did not punish her. But some of his companions who ate it, died. The Apostle of Allah (PBUH) had himself cupped on his shoulder on account of that which he had eaten from the sheep. AbuHind cupped him with the horn and knife. He was a client of Banu Bayadah from the Ansar.