The Sahabah (may Allah be pleased with them) were very keen to do anything that would bring them closer to Allah (may He be glorified and exalted). That included offering supererogatory and sunnah prayers before and after the [obligatory] prayers. In this hadith, Anas ibn Malik says that when the mu’adhdhin gave the adhan for Maghrib, some of the companions of the Prophet (blessings and peace of Allah be upon him) got up and rushed towards the pillars that held up the roof of the mosque. The purpose behind rushing to the pillars was so that they could use them as sutrahs to screen them from those who were walking in front of them, so that they could pray individually before Maghrib prayer, until the Prophet (blessings and peace of Allah be upon him) came out of his apartment to pray Maghrib whilst they were like that, rushing and hastening to pray two rak‘ahs before Maghrib prayer. A report narrated by Muslim from Anas ibn Malik (may Allah be pleased with him) adds: A stranger would come and think that the prayer had already been offered, because of the large numbers of people who were praying these two [voluntary] rak‘ahs. This is indicative of the large numbers of people who did these two rak‘ahs. Anas ibn Malik (may Allah be pleased with him) said: And there was hardly any time between the adhan and iqamah; in other words, there was not much time, so they would pray those two rak‘ahs within a brief period of time. This is what was explained and affirmed by Shu‘bah ibn al-Hajjaj al-Wasiti, one of the narrators of this hadith, when he said: There was only a short time between them. This hadith indicates that it is prescribed to pray two supererogatory rak‘ahs before Maghrib. It also indicates that the one who is praying on his own should have a sutrah (screen)..