إِن تَتُوبَا إِلَى اللَّـهِ فَقَدْ صَغَتْ قُلُوبُكُمَا [ 0 two wives of the Prophet,] If both of you repent to Allah, then [ your conduct calls for it, because ] your hearts have diverted....66:4). The reference here is made to two of his blessed wives who, as mentioned above in brief, contrived to draw the Holy Prophet ﷺ into swearing an oath and making the aforementioned promise to abstain from honey. Who are they? Bukhari and other collections of Traditions record a lengthy Tradition about this on the authority of Ibn ` Abbas ؓ who narrates that he was always on the look-out to enquire of Sayyidna ` Umar ؓ as to who were the two wives to whom reference had been made in the above verse. So, when Sayyidna ` Umar ؓ was on his way to pilgrimage, the former joined him. One day, in the course of the journey, the latter went to answer the call of nature. When he returned, the former had arranged water for the latter's ablution. He poured water on his hands. Whilst pouring the water for ablution, he enquired as to who were the two wives to whom reference is made in the dual verb اِن تَتُوبَآ (If both of you repent) Sayyidna ` Umar ؓ asked him in surprise: 'Do you not know who they were?' Ibn ` Abbas ؓ said: 'No!' Sayyidna ` Umar ؓ said they were Hafsah and 'A'ishah ؓ and then proceeded to recount a lengthy story related to this incident which also contained some incidents that took place earlier. The details of the incident are available in Tafsir Mazhari. This verse addresses the two blessed wives of the Holy Prophet ﷺ and requires them to turn to Allah as their hearts have deviated, albeit what they did, stem from their love for the Holy Prophet ﷺ ، but in the process they, in consultation with one another, adopted a way that hurt the Holy Prophet ﷺ . This is a sin for which repentance was necessary.
وَإِن تَظَاهَرَا عَلَيْهِ فَإِنَّ اللَّـهَ هُوَ مَوْلَاهُ وَجِبْرِيلُ (And if you back each other against him [ the Prophet ﷺ ], then Allah is his supporter, and Jibra'l (علیہ السلام) and righteous believers and, after all that, angels are his helpers....66:4). The current verse warns the wives that if they do not repent and please the Messenger of Allah ﷺ ، they will not cause any loss to him, because Allah is his Protector, and so are Jibril, every right-acting believer and, furthermore, the other angels too will come to his support, and it will be the wives themselves who will suffer loss.