Sahih al-Bukhari 2871

It is related that Abu Hurayra said, "When Khaybar was conquered, a poisoned sheep was presented to the Prophet, may Allah bless him and grant him peace. The Prophet, may Allah bless him and grant him peace, said, 'Gather for me all the Jews who are here.' They were gathered for him and he said, 'I am going to ask you about something. Will you tell me the truth about it?' They said, 'Yes.' The Prophet, may Allah bless him and grant him peace, said to them, 'Who is your father?' They replied, 'So-and-so.' He said, 'You have lied. Your father is so-and-so.' They said, 'You spoke the truth.' He said, 'So now will you tell me the truth about something if I ask you about it?' They answered, 'Yes, Abu'l-Qasim. If we lie, you will recognise our lie as you recognised it regarding our father.' He asked them, 'Who are the people of the Fire?' They said, 'We will be in it for a short time and then you will follow us in it.' The Prophet, may Allah bless him and grant him peace, said, 'May you be basely driven into it! By Allah, we will never follow you in it!' Then he said, 'Will you tell me the truth about something if I ask you about it?' They said, 'Yes, Abu'l-Qasim.' He asked, 'Did you put poison in this sheep?' They said, 'Yes.' He said, 'What made you do that?' They said, 'If you were a liar, then we would be relieved of you. If you are a Prophet, then it would not harm you.'" VIII: The ruler cursing those who have broken a treaty