"Imam al-Sadiq said: 'He who is slain in the path of God will not recount anything of his sins [his sins will be forgiven]."
-Hadith from Furu' al-Kafi, vol. 5
"It was narrated by Abu Zakariyya Yahya bin Durust (al-Basri) from Abu Isma'il from Yahya bin Abu Kathir from Abu Salama from Bushr bin Sa'id from Zayd bin Khalid al-Juhani from the Messenger of God (upon him be peace], who said: 'Who so ever prepares a ghazi in the path of God, it will be as if he has participated in a military expedition (faqad ghaza), and who so ever looks after the family of a ghazi, it will be as if he has participated in a military expedition (faqad ghaza)."
-Hadith #1628 from the Jami' of al-Tirmidhi (sahih hadith)