"We were with the Messenger of Allah ﷺ collecting the Qur'an on pieces of cloth, so the Messenger of Allah ﷺ said: 'Tuba is for Ash-Sham.' So we said: 'Why is that O Messenger of Allah?' He said: 'Because the angels of Ar-Rahman spread their wings over it.'" (Using translation from Tirmidhī 3954)
كُنَّا عِنْدَ رَسُولِ اللَّهِ ﷺ نُؤَلِّفُ الْقُرْآنَ مِنَ الرِّقَاعِ إِذْ قَالَ رَسُولُ اللَّهِ ﷺ «طُوبَى لِلشَّامِ» فَقُلْنَا لِأَيِّ شَيْءٍ ذَاكَ؟ فَقَالَ «لِأَنَّ مَلَائِكَةَ الرَّحْمَنِ بَاسِطَةٌ أَجْنِحَتَهَا عَلَيْهِمْ»