From Sahih Bukhari (Hadith 3925):
Narrated Al-Bara bin Azib:The first people who came to us (in Medina) were Mus`ab bin `Umair and Ibn Um Maktum who were teaching Qur'an to the people. Then there came Bilal, Sa`d and `Ammar bin Yasir. After that `Umar bin Al-Khattab came along with twenty other companions of the Prophet. Later on the Prophet (ﷺ) himself came (to Medina) and I had never seen the people of Medina so joyful as they were on the arrival of Allah's Apostle, for even the slave girls were saying, "Allah's Messenger (ﷺ) has arrived!" And before his arrival I had read the Sura starting with:-- "Glorify the Name of your Lord, the Most High" (87.1) together with other Suras of Al-Mufassal
Reference: Bukhari 3925