Abdallah b. Umayr al-Laythi came to Abi Ja`far عليه السلام and said to him: what do you say about Mut`a of women? He said: Allah made it Halal in His book and upon the tongue of His prophet صلى الله عليه وآله – so it is Halal up to the day of judgment. He said: O Aba Ja`far – someone like you says this while Umar forbade it and prohibited others from it! he said: even if he had done so! He said: I seek refuge for you with Allah from permitting something which was forbidden by Umar, he [Zurara] said: so he [al-Baqir] said to him: then you are upon the verdict of your man [Umar] while I am upon the verdict of the messenger of Allah صلى الله عليه وآله – come forth I challenge you to an imprecation [Mubahila] confirming that the truth is that which the messenger of Allah said and that what your man said is false, so Abdallah b. Umayr drew near to him and said: would it please you that your women-folk, daughters, sisters, and cousins do that? so Abu Ja`far turned away from him when he brought up his women-folk and cousins.