Mishkat al-Masabih 30 Fine Qualities كتاب المناقب 292

وَعَنْ أَبِي الدَّرْدَاءِ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: ” إِنَّ فُسْطَاطَ الْمُسْلِمِينَ يَوْمَ الْمَلْحَمَةِ بِالْغُوطَةِ إِلَى جَانِبِ مَدِينَةٍ يُقَالُ لَهَا: دِمَشْقُ مِنْ خَيْرِ مَدَائِنِ الشَّامِ ” . رَوَاهُ أَبُو دَاوُد

Abud Darda’ reported God’s messenger as saying, “The place of assembly of the-Muslims at the time of the war will be in al-Ghuta near a city called Damascus, one of the best cities of Syria.” Aba Dawud transmitted it.