Musannaf Ibn Abi Shaybah 35379 — Those who campaigned with polytheists

Jabir (may Allah have mercy on him) said: I asked Amir (may Allah have mercy on him) about those Muslims who take the People of the Book along on jihad. Amir (may Allah have mercy on him) said: I found the imams, both the jurists among them and those who were not jurists, taking the protected non-Muslims (dhimmis) along on jihad as well. They would then distribute spoils among them too, and they would reduce part of their jizyah, and this was by way of an additional kindness for them.