Hadith 1312

'Abdullah bin 'Amr bin Al-'As (May Allah be pleased with them) reported: The Messenger of Allah (PBUH) said, "Allah forgives every sin of a martyr, except his debt."

[Muslim].

Another narration in Muslim is: The Messenger of Allah (PBUH) said, "Being martyred in the Cause of Allah expiates for everything, except debt."