Hadith on the virtue of those who refuse to participate in unjust battles:

Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “Woe to the Arabs from the evil which is approaching! He has succeeded who has restrained his hand from fighting.”

Source: Sunan Abu Dawud 4249

Grade: Sahih (authentic) according to As-Suyuti

For ARABIC, click here:

http://dailyhadith.abuaminaelias.com/2012/09/09/hadith-on-trials-the-virtue-of-those-who-refuse-to-participate-in-unjust-battles/