Sahih Bukhari Volume 4, Book 52, Hadith Number 96.

Narated By Zaid bin Khalid : Allah’s Apostle said, ” He who pre pares a Ghazi going in Allah’s Cause is given a reward equal to that of) a Ghazi; and he who looks after properly the dependents of a Ghazi going in Allah’s Cause is (given a reward equal to that of) Ghazi.”