Who was Kaʿb's guide from among his sons when Kaʿb became blind: I heard Kaʿb bin Malik saying, "When some people remained behind and did not join Messenger of Allah ﷺ in the battle of Tabuk.." and then he described the whole narration and said, "Messenger of Allah ﷺ forbade the Muslims to speak to us, and so we (I and my companions) stayed fifty nights in that state, and then Messenger of Allah ﷺ announced Allah's acceptance of our repentance."  

عَنْ رَسُولِ اللَّهِ ﷺ فِي غَزْوَةِ تَبُوكَ فَذَكَرَ حَدِيثَهُ وَنَهَى رَسُولُ اللَّهِ ﷺ الْمُسْلِمِينَ عَنْ كَلاَمِنَا فَلَبِثْنَا عَلَى ذَلِكَ خَمْسِينَ لَيْلَةً وَآذَنَ رَسُولُ اللَّهِ ﷺ بِتَوْبَةِ اللَّهِ عَلَيْنَا