Musnad Abu Ya'la al-Mawsili 110:48

Abu Bakr narrated to us, Ubaydah ibn Humayd narrated to us, from Yazid ibn Abi Ziyad, from Tamim ibn Salamah, from Masruq, from Ibn Abbas, who said: The Messenger of Allah (ﷺ) went out and camped at night, then he slept and did not wake up until the sun [had risen]. The Messenger of Allah (ﷺ) ordered Bilal, so he gave the adhan, then he prayed two rak'ahs. Ibn Abbas said: The world and everything in it would not please me more than that [concession].