The Messenger of Allah ﷺ was on a journey, and they slept past the dawn prayer. They woke to the heat of the sun, so they moved on a little until the sun had fully risen. Then he ordered a muadhin to call the adhan, and he prayed two rakahs before the dawn prayer. Then the iqamah was called, and he prayed the dawn prayer.
أن رسول الله ﷺ كان في مسير له فناموا عن صلاة الفجر، فاستيقظوا بحر الشمس، فارتفعوا قليلا حتى استقلت الشمس، ثم أمر مؤذنا فأذن، فصلى ركعتين قبل الفجر، ثم أقام، ثم صلى الفجر.
Abu Dawud narrated it (443). He said, "Wahb bin Baqiya told us, from Khalid, from Yunus bin Ubayd, from Hasan, from Imran bin Husayn," then he mentioned the hadith. Its isnad is sahih, and Khalid is Ibn Abdullah al-Tahhan.Hakim said in al-Mustadrak (1/274), after narrating the hadith through the route of Ishaq bin Shahin, from Khalid bin Abdullah, with this wording, "This is a sahih hadith, based on what we have already mentioned regarding the soundness of Hasan's hearing from Imran bin Husayn, though the two of them (Bukhari and Muslim) did not include it."I say, Hasan appears in it, and he was known to conceal the identity of his source, narrating with the ambiguous form "from," despite disagreement over whether he actually heard from Imran bin Husayn. The correct view is that he did hear from him. This hadith has also come through another route, narrated by Ibn Khuzayma (2/99) from Awf, from Abu Raja, who said, "Imran bin Husayn told us," and in it, "He called for the prayer, so he led the people in it."Its origin is found in the Sahihayn, and it has already been mentioned in the chapter on tayammum.