Abu 'Abdur Rahman al-Habli عبد الله بن يزيد أبو عبد الرحمن الحبلي · Jihad (Kitab Al-Jihad)

Buraidah reported the Apostle of Allaah(ﷺ) as saying “Respect to be shown by those who stay at home to the women of those who are engaged in jihad is t be like that shown to their mothers. If any man among those who stay at home is entrusted with the oversight of one’s family who is engaged in jihad and betrays him, he will be setup for him on the Day of Resurrection and he (the mujahid) will be told…

The Messenger of Allah (ﷺ) used to give to some of the detachments he sent out (something extra) for themselves in particular apart from the division made to the whole army. The fifth is necessary in all that.