Retaliation
كتاب القصاص
Chapter 13: Killing Apostates and People who Strive to cause Mischief - Section 3
Abu Ghalib told that when Abu Umama saw some heads set up on the road to Damascus he said, “The dogs of hell, the worst people killed under the sky. The best who have been killed are those killed by them.” He then recited, “On the day when some faces will be white and some faces will be black (Al-Qur’an, 3:106). Abu Umama was asked whether he had heard it from God’s Messenger and replied, “If I had heard it only once, twice, or thrice (counting up to seven times) I would not have told you.” Tirmidhi and Ibn Majah transmitted it, Tirmidhi saying this is a hasan tradition.