Traced to Ka'b al-Ahbar (automatic guess): a report of earlier scriptures, not a hadith of the Prophet ﷺ.
حمص من الجند الذي يشفع شهيدهم لسبعين، وأهل دمشق الذين يعرفون بالثياب الخضر في الجنة، وأهل الأردن من الجند الذين هم في ظل العرش يوم القيامة، وأهل فلسطين ممن ينظر الله إليهم كل يوم مرتين
Homs is among the soldiers whose martyr will intercede for the seventy, and the people of Damascus are known for wearing green clothes in Paradise, and the people of Jordan are among the soldiers who will be in the shadow of the throne on the Day of Resurrection, and the people of Palestine are among those whom Allah looks at twice every day.
عبد القدوسسعيد بن عبد العزيزعروة بن رويمكعبautomatic reading, unverified