Musannaf Ibn Abi Shayba 21:483

Ubayd Allah ibn Musa narrated to us, from Firas, from Shayban, from al-Sha’bi, from Abu Muslim, that he used to say at the end of his speech: "May Allah join your brotherhood with faith, and bring your affection near with His mercy. And may He establish your honor with His benevolence, and illuminate your chests with the Quran."