Mishkat al-Masabih 16 Retaliation كتاب القصاص 100

وَعَن أبي غالبٍ رأى أَبُو أُمامةَ رؤوساً مَنْصُوبَةً عَلَى دَرَجِ دِمَشْقَ فَقَالَ أَبُو أُمَامَةَ: «كِلَابُ النَّارِ شَرُّ قَتْلَى تَحْتَ أَدِيمِ السَّمَاءِ خَيْرُ قَتْلَى مَنْ قَتَلُوهُ» ثُمَّ قَرَأَ (يَوْمَ تبيَضُّ وُجوهٌ وتَسوَدُّ وُجوهٌ) الْآيَةَ قِيلَ لِأَبِي أُمَامَةَ: أَنْتَ سَمِعْتُ مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ؟ قَالَ: لَوْ لَمْ أَسْمَعْهُ إِلَّا مَرَّةً أَوْ مَرَّتَيْنِ أوْ ثَلَاثًا حَتَّى عَدَّ سَبْعًا مَا حَدَّثْتُكُمُوهُ. رَوَاهُ التِّرْمِذِيُّ وَابْنُ مَاجَهْ وَقَالَ التِّرْمِذِيُّ: هَذَا حَدِيثٌ حَسَنٌ

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.