It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that when Khaybar was conquered, a goat was sent as a gift to the Holy Prophet (peace and blessings be upon him) from the Jews, which was actually poisoned. The Holy Prophet (peace and blessings be upon him) came to know of it. He (peace and blessings be upon him) said, "Gather all the Jews who are here." So they were gathered. The Holy Prophet (peace and blessings be upon him) said to them, "I want to ask you something. Will you speak the truth?" They said, "Yes, O Abu al-Qasim (peace and blessings be upon him)." The Holy Prophet (peace and blessings be upon him) asked, "Who is your father?" They said, "So-and-so man." The Holy Prophet (peace and blessings be upon him) said, "You are lying. Your father is so-and-so." They said, "You have spoken the truth." Then the Holy Prophet (peace and blessings be upon him) said, "If I ask you something, will you answer it correctly?" They agreed and said, "If we lie, you will find out yourself, just as you found out about our father." The Holy Prophet (peace and blessings be upon him) asked, "Who are the people of Hell?" They said, "For a while, we will remain in it, then your Ummah (nation)." The Holy Prophet (peace and blessings be upon him) said, "We will never follow you into Hell." Then the Holy Prophet (peace and blessings be upon him) said, "If I ask you something, will you answer it correctly?" They agreed. The Holy Prophet (peace and blessings be upon him) asked, "Did you put poison in this goat?" They admitted it. The Holy Prophet (peace and blessings be upon him) asked, "Why did you do this?" They said, "We wanted that if you (God forbid) are a liar, we would be rid of you, and if you are a true Prophet, then it would not harm you."