Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم said, ‘O ‘Alī (کَـرَّمَ الـلّٰـهُ تَـعَالٰی وَجۡھَـهُ الۡـکَرِیۡم) do not delay three things (1) Ṣalāĥ, when its time arrives. (2) A funeral when the corpse is present. (3) Marrying the woman who has no husband; provided Kufw is available.’ (Sunan-ut-Tirmiżī, vol. 2, pp. 339, Ḥadīš 1077)
Secondly, marriage is a life-long bond and therefore, mental and behavioural compatibility is vital. In order for a couple to live a successful married life, cohesion and mutual understanding are important not only among the couple but also among their families. Kufw is a factor that assists in achieving these objectives. These are the reasons for considering it.
Thirdly, Kufw is viewed as vital on account of the rights of guardians. That is, the father and the grandfather who are guardians have to face embarrassment and disgrace in case of ignoring Kufw. This is not hidden from anyone. Therefore, in order to protect guardians from humiliation and disgrace, they were commanded to ensure Kufw. If a woman marries a non-Kufw man without their permission, then her marriage will be declared invalid due to ignoring the right of her guardians.
Question: What about husbands and wives who accuse each other of unfaithfulness based on suspicion?
Answer: This is a grave sin, Ḥarām and leads to Hell. This is a common problem these days. Some people hold doubts in their minds, which lead to suspicions and accusations and result in them destroying their own peaceful homes with their own hands. On the basis of suspicion sometimes husbands call their wives adulteresses and sometimes wives suspect their husbands of having affairs. Both accuse each other of infidelity and have feuds and then leave such a