It has been narrated on the authority of Sulaimin b. Buraida who learnt the tradition from his father. The latter said that the Messenger of Allah (ﷺ) said:
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)?