Sunan Abi Dawud Book 4, Hadith 50
Allah, the Exalted, prescribed prayer for you, through the tongue of your Prophet (ﷺ), four rak'ahs while resident, two rak'ahs while travelling and one rak'ah in time of danger.
Tha'labah ibn Zahdam said: We accompanied Sa'd ibn al-'As at Tabaristan. He stood and said: Which of you prayed along with the Messenger of Allah (ﷺ) in time of danger? Hudhayfah said: I then he led one section in one rak'ah and the other section in one rak'ah. They did not pray the second rak'ah by themselves.
Abu Dawud: This tradition has been transmitted by 'Ubaid Allah b. 'Abd Allah and Mujahid on the authority of Ibn 'Abbas from the Prophet (ﷺ) in like manner. This has also been narrated by 'Abd Allah b. Shaqiq from Abu Hurairah from the Prophet (ﷺ). Yazid al-Faqir and Abu Musa also narrated this tradition from Jabir from the Prophet (ﷺ). Some of the narrators said in the version narrated by Yazid al-Faqir that they completed their second rak'ah. This has also been narrated by Simak al-Hanafi on the authority of Ibn 'Umar from the Prophet (ﷺ) something similar. Zaid b. Thabit also narrated from the Prophet (ﷺ) in like manner. This version adds: The people prayed on rak'ah and the Prophet (ﷺ) prayed two rak'ahs.
The Prophet (ﷺ) offered the noon prayer in time of danger. Some of the people formed a row behind him and others arrayed themselves against the enemy. He led them in two rak'ahs and then he uttered the salutation. Then those who were with him went away and took the position of their companions before the enemy. Then they came and prayed behind him. He led them in two rak'ahs and uttered the salutation. Thus the Messenger of Allah (ﷺ) offered four rak'ahs and his companions offered two rak'ahs.
Al-Hasan used to give legal verdict on the authority of this tradition.
Abu Dawud said: This will be so in the sunset prayer. The imam will offer six rak'ahs and the people three rak'ahs.
Abu Dawud said: Yahya b. Abi Kathir narrated from Abu Salamah from Jabir from the Prophet (ﷺ) something similar. Sulaiman al-Yashkuri reported it from the Prophet (ﷺ) in like manner.