It is narrated from Hazrat Anas (may Allah be pleased with him) that when the muezzin would stand and give the call to Maghrib prayer in the Prophet's Mosque, then after that, whoever wished would perform two rak'ahs until the congregational prayer was established, and whoever wished would perform two rak'ahs and then sit down, and all of this would happen in front of the eyes of the Prophet (peace and blessings be upon him).