صحیح مسلم · Hadith 1565

Imran b. Husain reported: We were with the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) in a journey and we travelled throughout the night till at the end, just before dawn, we lay down (for rest), and nothing is sweeter for a traveller than this and none awakened us but the heat of the sun, and the rest of the hadith is the same (as mentioned above) except this additien: When 'Umar b. Khattab woke up, he saw what had happened to the people. And he was a man having a big belly and strongly built; he recited takbir in a loud voice till the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) woke up by the loudness of his voice in takbir. When the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) got up, the people told him what had happened. Upon this the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) said: There is no harm; you better proceed further, and (the rest of the hadith) was narrated.