al-Laith bin Sa'd الليث بن سعد · The Book on Traveling

"I accompanied the Messenger of Allah on eighteen journeys, and I did not see him leave the two Rak'ah when the sun waned before Zuhr."

"While the Prophet as at the Battle of Tabuk, if he wanted to depart before the sun's decline he would delay Zuhr so that he could pray it together with Asr. If he wanted to depart after the sun's decline, he would hasten Asr to Zuhr, and pray Zuhr and Asr together, and then move it. If he wanted to depart before Maghrib he would delay Maghrib until he prayed it with Isha, and if he wanted to depart after…

he saw the Messenger of Allah at Ahjar Az-Zait, supplicating for rain, and he was raising his hands in supplication.

"I performed eleven prostrations with the Messenger of Allah, among them was that which is in Surat An-Najm."