Hadith 2884
Sayyiduna Jabir bin Abdullah (may Allah be pleased with both of them) narrates: We came along with the Prophet (peace and blessings of Allah be upon him) until we reached the place of Dhat al-Riqa’, then it was announced that congregational prayer was about to be held. Then the Prophet (peace and blessings of Allah be upon him) led one group in two rak‘ahs, then they moved back and he led the other group in two rak‘ahs, so the Prophet (peace and blessings of Allah be upon him) performed four rak‘ahs and those people performed two rak‘ahs.