The sanctity of the wives of Mujahids is like the sanctity of their mothers for those who sit at home (i. e do not go out for Jihad). Anyone who stays behind looking after the family of a Mujahid and betrays his trust will be made to stand on the Day of judgment before the Mujahid who will take away from his meritorious deeds whatever he likes. So what do you think (will he leave anything)?  

قَالَ رَسُولُ اللَّهِ ﷺ حُرْمَةُ نِسَاءِ الْمُجَاهِدِينَ عَلَى الْقَاعِدِينَ كَحُرْمَةِ أُمَّهَاتِهِمْ وَمَا مِنْ رَجُلٍ مِنَ الْقَاعِدِينَ يَخْلُفُ رَجُلاً مِنَ الْمُجَاهِدِينَ فى أَهْلِهِ فَيَخُونُهُ فِيهِمْ إِلاَّ وُقِفَ لَهُ يَوْمَ الْقِيَامَةِ فَيَأْخُذُ مِنْ عَمَلِهِ مَا شَاءَ فَمَا ظَنُّكُمْ  

This tradition has been narrated by the same authority through different chain of transmitters.  

يَعْنِي النَّبِيَّ ﷺ بِمَعْنَى حَدِيثِ الثَّوْرِيِّ  

It will be said to the Mujahid: Take from his noble deeds whatever you like. Then the Messenger of Allah ﷺ turned to us and asked: What do you think (will he leave anything)? - (i. e. he will take away everything).  

فَخُذْ مِنْ حَسَنَاتِهِ مَا شِئْتَ فَالْتَفَتَ إِلَيْنَا رَسُولُ اللَّهِ ﷺ فَقَالَ فَمَا ظَنُّكُمْ