Narrated Zaid bin Thabit:"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

English translation · Jami' at-Tirmidhi