The Prophet (ﷺ) led a group of his companions in praying two rak'ahs, then he said the taslim, then he led some others in praying two rak'ahs, then he said the taslim.
Sunan an-Nasa'i Book 18, Hadith 24
← Previous Hadith The Messenger of Allah (ﷺ) led the people in offering the fear prayer, two rak'ahs. Then he said the taslim and led others in offering the fear prayer, then he said the taslim. So the Prophet (ﷺ) had prayed four rak'ahs.

Sunan an-Nasa'i Book 18, Hadith 23 Next Hadith → "The imam should stand up facing the Qiblah and some of them should stand with him while the others stand facing the enemy. Then he should pray one rak'ah with them and they should pray another rak'ah by themselves, and prostrate twice where they are. Then they should go to where the others are and the others should come and he should lead them in bowing once and prostrating twice, so it will be two rak'ahs for him and one for them. Then they should bow once and prostrate twice (by themselves, to make up the other rak'ah)."

Sunan an-Nasa'i Book 18, Hadith 25