On the other hand, Muslim scholars have scrutinized the reports of the Children of Israel and disproved and refuted of it whatever opposed the truth. Thus, Ka`b in this regard resembles `Abdullah ibn `Amr , `Abdullah ibn Salam, Wahb, and others of those who transmitted the reports of the Children of Israel .
Just as it is impermissible to accuse `Abdullah ibn `Amr ibn Al`As (may Allah be pleased with them) of being a Jew because he transmitted much from the reports of the Children of Israel that were in the two loads he seized on the day of Al Yarmuk of their (Jews') books, thus it is impermissible to accuse Ka`b of being a Jew or of plotting against Islam due to the same reason.
It is also impermissible to set him side by side with `Abdullah ibn Saba' and the likes of wellknown disbelievers, atheists, and plotters against Islam.
It is narrated in the Two Sahih Books (i.e. AlBukhari and Muslim)from Abu Dhar (may Allah be pleased with him) that the Prophet (peace be upon him) said, He who brands another as disbeliever or says to him "O enemy of Allah", while in fact he is not so, it certainly rebounds on him .
This Hadith and others with the same meaning make it an obligation that the Muslim ascertain in judging people and be careful not to slander his fellow Muslims on the mere grounds of suspicion or the blind imitation of unreliable persons. Indeed, it is Allah (alone) Whose Help we seek.