It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that when Khaybar was conquered, a poisoned goat was sent to the Messenger of Allah (peace and blessings be upon him) from the Jews. The Messenger of Allah (peace and blessings be upon him) said: Gather all the Jews who are here. So they were gathered. Then the Messenger of Allah (peace and blessings be upon him) said to them: I am going to ask you about something; will you tell me the truth about it? They said: Yes, O Abu al-Qasim! The Messenger of Allah (peace and blessings be upon him) asked them: Who is your father? They replied: Our father is so-and-so. He (peace and blessings be upon him) said: You are lying; your father is so-and-so. Hearing this, they said: You have spoken the truth. He (peace and blessings be upon him) then said to them: I am going to ask you about something; will you tell me the truth? They said: Yes, O Abu al-Qasim! And if we lie to you, you will surely find out, just as you have found out about our father. The Messenger of Allah (peace and blessings be upon him) asked: Who are the people of the Fire? They said: We will remain in it for a while, and after us, you people will enter it. The Messenger of Allah (peace and blessings be upon him) said: After you, we will never enter it. Then he (peace and blessings be upon him) said to them: I am going to ask you about something; will you tell me the truth? They said: Yes, O Abu al-Qasim! He (peace and blessings be upon him) said: Did you put poison in this goat? They said: Yes, we did. He (peace and blessings be upon him) said: What made you do this? They said: We thought that if you are a liar, we will be relieved of you, and if you are a true Prophet, then it will not harm you.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with him) that a Jewish woman presented a poisoned goat as a gift to the Messenger of Allah (peace and blessings be upon him). When he came to know of it, he sent for her and asked: "What made you do this act?" She said: "I intended that if you are a true Prophet, Allah the Exalted would inform you about it, and if you are not a true Prophet, then in this way I would relieve the people of you." Sayyiduna Ibn Abbas (may Allah be pleased with him) says that whenever the Messenger of Allah (peace and blessings be upon him) later felt the effect of that poison, he would have cupping done. Once, while he was on a journey and had entered the state of Ihram, he felt the effect of that poison, so he had cupping done.