'You forgot a Rak'ah of the prayer!' So he came back into the Masjid and told Bilal to call the Iqamah for prayer, then he led the people in praying one Rak'ah. I told the people about that and they said to me: 'Do you know who that man was?' I said: 'No, not unless I see him.'. Then he passed by me and I said: 'This is he.' They said: 'This is Talha bin 'Ubaidullah.'"
Sunan an-Nasa'i Book 7, Hadith 39
← Previous Hadith "We were fighting a battle and the idolators kept us from praying Zuhr, 'Asr, Maghrib and 'Isha'. When the idolaters went away, the Messenger of Allah (S.A.W) commanded a caller to say Iqamah for Zuhr prayer, and we prayed. Then he said the Iqamah for 'Asr, and we prayed, and he said the Iqamah for Maghrib and we prayed, and he said the Iqamah for 'Isha' and we prayed. Then we went around among us and said: 'There is no group on Earth who is remembering Allah, the Mighty and Sublime, except you.'"

Sunan an-Nasa'i Book 7, Hadith 38 Next Hadith → "This is a shepherd or a man who is away from his family." So they looked and so it was a shepherd.

Sunan an-Nasa'i Book 7, Hadith 40