Abu Dawud Book 8, Hadith Number 2497.
Chapter : Not known.
Narated By AbuUmamah : The Prophet (PBUH) said: He who does not join the warlike expedition (jihad), or equip, or looks well after a warrior’s family when he is away, will be smitten by Allah with a sudden calamity. Yazid ibn Abdu Rabbihi said in his tradition: ‘before the Day of Resurrection”.