Musnad Abu Ya'la al-Mawsili 108:90

'Isa ibn Salim narrated to us, 'Ubayd Allah ibn 'Amr narrated to us, from Ibn 'Aqil, from Jabir ibn 'Abd Allah, who said: A man came to the Prophet, may Allah bless him and grant him peace, and said: "O Messenger of Allah, have you considered if I struggle in the way of Allah, being patient, seeking reward, advancing and not retreating, until I am killed—will I enter Paradise?" He said: "Yes, unless you have a debt for which you have no repayment."