There is an individual at (my) job who is a Raafidhee. Some of the workers informed me that he has explicitly accused the Mother of the Believers Aa’ishah (radiyallahu ‘anhaa) of fornication (and the refuge is with Allaah). Knowing that he did not do that in public and there has not occurred between me and him a debate regarding the issue, is it permissible for me to classify him with kufr (disbelief) by my saying: You are a Kaafir (disbeliever) because you hold this belief or is it a must that I sit with him and debate with him regarding the issue knowing that he openly displays (the qualities of) hypocrisy and lying; and is it permissible to sit with him inside or outside of work even when the issue does not arise? Please give us a verdict, may Allaah reward you.
I say, whoever explicitly accuses the Mother of the Believers Aa’ishah the daughter of as-Siddeeq (radiyallaahu ‘anhumaa), the one who Allaah has vindicated from above the seven heavens and has sent down her vindication in verses which are recited until the Day of Judgment; whoever does that then he has disbelieved with a kufr that expels him from the religion, and he is bound to spend eternity in the fire. Because he has belied Allaah (azza wa Jal) in His informing of her vindication. Al-Qurtubee has mentioned that in his Tafseer from Maalik. Ibn Katheer, may Allaah have mercy upon him, said in his Tafseer of the verse:
"Verily those who accuse chaste women who never even think of anything touching their chastity and are good believers, then they are cursed in this life and in the Hereafter, and for them will be a great torment. On the Day when their tongues, hands and legs will testify against them as to what they used to do."
He, may Allaah have mercy upon him, said: This is a threat from Allaah the Exalted to those who accuse chaste women who never think of anything touching their chastity and are believers, being all inclusive. Therefore, the Mothers of the Believers are even more entitled to enter into this than every other chaste woman. Especially she who was the reason for the revelation of this verse, that is Aa’ishah the daughter of as-Siddeeq. The scholars, may Allaah have mercy upon them, are in total agreement that whoever reviles her and accuses her with that which he has accused her with after that which has been mentioned in the verse, then he is a Kaafir; because he rejects the Qur’aan. Regarding the other Mothers of the Believers there are two sayings (amongst the scholars). The most correct of them is that they are similar to her (in this ruling), and Allaah knows best
And upon this, there is consensus that whoever reviles Aa’ishah (radiyallahu ‘anhaa) (accusing) her with fornication after Allaah has vindicated her from it in His Book, then he is a Kaafir whose blood and wealth are permissible, and it is obligatory that he be killed (by those in judicial authority).
Shyakhul-Islaam Ibn Taymiyyah, may Allaah have mercy upon him, said in his book, as-Saarim al-Maslool Alaa Shaatimir-Rasool (sallaallahu ‘alayhi wa sallam) Pg. 565-567: Chapter: Reviling the Wives of the Prophet:
"Al-Qaadee Abu Ya’laa, may Allaah have mercy upon him, said: Whoever wrongfully accuses Aa’ishah of az-Zinaa (fornication) after Allaah has vindicated her from it has disbelieved with there being no difference of opinion concerning this.”
More than one of the scholars have reported the consensus upon this and more than one of the Imaams has explicitly stated this ruling. It has been narrated from Maalik:
"Whoever reviles Abu Bakr is to be lashed and whoever reviles Aa’ishah, accusing her with that which Allaah has vindicated her from then he is killed; for he has opposed the Quraan:
'Allaah forbids you from it and warns you not to repeat it if you are indeed believers.'(Sooratun-Noor, 24:17)”
Aboo Bakr ibn Ziyaad an-Naysaabooree said: I heard al-Qaasim ibn Muhammad saying to Ismaa’eel ibn Is-haaq:
"Al-Ma’moom came with two men bound in chains. One of them had cursed Faatimah and the other had cursed Aa’ishah. So he commanded with the killing of the one who had cursed Faatimah and he left the other. So Isma’eel said to him: What is their ruling except that they both are to be killed? For the one who has cursed Aa’ishah has rejected the Quraan. And upon this is the history of the people of Fiqh and knowledge from the Ahlul-Bayt and other than them."