Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) said: "The death of a stranger far from home is martyrdom. When death approaches him, he casts his gaze to his right and to his left and sees no one he knows except strangers; then he remembers his family and his children and sighs. For every sigh, Allah erases two million of his sins and records two million good deeds for him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10988