Abu Dawud Book 2, Hadith Number 1240.
Narated By N/A : This tradition has been transmitted by Khusaif with a different chain of narrators to the same effect. This version adds: The Prophet (PBUH) uttered the takbir and both the rows uttered the takbir together.
Abu Dawud said: This tradition has been narrated by al-Thawri to the same effect on the authority of Khusaif. ‘Abd al-Rahman b. Samurah also prayed in like manner. But the section which he (the Prophet) led in one rak’ah and then uttered the salutation and went and took the place of their companions. They came and prayed one rak’ah by themselves. Then they returned to their place and they prayed (one rak’ah) by themselves.
Abu Dawud said: Muslim b. Ibrahim reported from ‘Abd al-Samad b. Habib on the authority of his father that they had fought a battle at Kabul along with ‘Abd al-rahman b. Samurah. He led us in prayer in time of danger.