Mishkat al-Masabih 30 Fine Qualities كتاب المناقب 302

وَعَنْ مُعَاوِيَةَ بْنِ قُرَّةَ عَنْ أَبِيهِ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا فَسَدَ أَهْلُ الشَّامِ فَلَا خَيْرَ فِيكُمْ وَلَا يَزَالُ طَائِفَةٌ مِنْ أُمَّتِي مَنْصُورِينَ لَا يَضُرُّهُمْ مَنْ خَذَلَهُمْ حَتَّى تَقُومَ السَّاعَةُ» قَالَ ابْنُ الْمَدِينِيِّ: هُمْ أَصْحَابُ الْحَدِيثَ. رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ

Mu’awiya b. Qurra quoted his father’s authority for the statement that God’s messenger said, “When the Syrians become corrupt there will be good in you, but a section of my people will continue to be helped, not being injured by those who desert them, till the last hour comes.” Ibn al-Madini said they are the traditionists. Tirmidhi transmitted it, saying this is a hasan sahih tradition.