"I saw 'Umar bin Al-Khattab praying two rak'ahs in Dhul-Hulaifah and I asked him about that. He said: 'I am simply doing that which I saw the Messenger of Allah (ﷺ) doing.'"
Sunan an-Nasa'i Book 15, Hadith 5
← Previous Hadith "We used to travel with the Messenger of Allah (ﷺ) between Makkah and Al-Madinah, fearing nothing but Allah, the Mighty and Sublime, and praying two rak'ahs."

Sunan an-Nasa'i Book 15, Hadith 4 Next Hadith → "I went out with the Messenger of Allah (ﷺ) from Al-Madinah to Mekkah, and he continued to shorten his prayers, and he stayed there for ten days."

Sunan an-Nasa'i Book 15, Hadith 6