"The sanctity of the wive of the Mujahidin to those who stay behind is like the sanctity of their mothers. If he takes on the responsibility of looking after his wife then betrays him, it will be said to him on the Day of Resurrection: 'This one betrayed you with your wife, so take whatever you want of his good deeds.' So what do you think?" (Using translation from Nasāʾī 3190)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ حُرْمَةُ نِسَاءِ الْمُجَاهِدِينَ عَلَى الْقَاعِدِينَ كَحُرْمَةِ أُمَّهَاتِهِمْ فَإِذَا خَلَّفَهُ فِي أَهْلِهِ فَخَانَهُ قِيلَ لَهُ يَوْمَ الْقِيَامَةِ هَذَا خَانَكَ فِي أَهْلِكَ فَخُذْ مِنْ حَسَنَاتِهِ مَا شِئْتَ فَمَا ظَنُّكُمْ؟  

"The sanctity of the wives of the Mujahidin to those who stay behind is like the sanctity of their mothers. There is no man among those who stay behind who takes on the responsibility of looking after the wife of one of the Mujahidin (and betrays him) but he (the betrayer) will be made to stand before him on the Day Resurrection and it will be said: 'O So-and-so, this is so-and-so, take whatever you want from his good deeds.'" Then the Prophet ﷺ turned to his Companions and said: "What do you think: Will he leave him any of his good deeds?" (Using translation from Nasāʾī 3191)  

عَنِ النَّبِيِّ ﷺ قَالَ حُرْمَةُ نِسَاءِ الْمُجَاهِدِينَ عَلَى الْقَاعِدِينَ فِي الْحُرْمَةِ كَأُمَّهَاتِهِمْ وَمَا مِنْ رَجُلٍ مِنَ الْقَاعِدِينَ يُخَلِّفُ رَجُلًا مِنَ الْمُجَاهِدِينَ فِي أَهْلِهِ فَيَخُونُهُ إِلَّا نُصِبَ لَهُ يَوْمَ الْقِيَامَةِ فَيُقَالُ يَا فُلَانُ هَذَا فُلَانٌ خُذْ مِنْ حَسَنَاتِهِ مَا شِئْتَ ثُمَّ الْتَفَتَ النَّبِيُّ ﷺ إِلَى أَصْحَابِهِ فَقَالَ «مَا ظَنُّكُمْ تَرَوْنَ يَدَعُ لَهُ مِنْ حَسَنَاتِهِ شَيْئًا؟»