Abu Najih as-Sulami told that he heard Allah's Messenger ﷺ say, “He who causes an arrow to hit its mark in Allah’s path will have it count as a degree for him in paradise, if anyone shoots an arrow in Allah’s path it is equivalent to his setting someone free, and if anyone develops a grey hair on behalf of Islam it will be a light for him on the day of resurrection." Baihaqi transmitted it in Shu'ab al-iman. Abu Dawud transmitted the first section, Nasa’i the first and second, and Tirmidhi the second and third. The version of Nasa’i and Tirmidhi has, “If anyone develops a grey hair in Allah’s path,” instead of “on behalf of Islam."