The Prophet (blessings and peace of Allah be upon him) was keen to offer supererogatory prayers, which he did regularly. That includes regularly offering the Sunnah prayers, both regular (ratibah) and non-regular, before and after the obligatory prayers. In this hadith, ‘A’ishah (may Allah be pleased with her) narrates that the Prophet (blessings and peace of Allah be upon him) regularly offered two Sunnah prayers, which he did not omit “in private or in public.” This is a confirmation that he always did them. What is meant by that which was done in private is that they were prayers that he used to pray in his house, so no one saw him do them except one of his wives. And what is meant by that which was done in public is prayers that he used to offer in the mosque. Then she (may Allah be pleased with her) explained what these two rak‘ahs, or two prayers, were. The first was two Sunnah rak‘ahs of Fajr before the obligatory prayer, between the adhan and iqamah. The Sunnah prayer before Fajr is one of the regular Sunnah prayers. The Prophet (blessings and peace of Allah be upon him) used to urge people to offer these two rak‘ahs because of the virtue and reward that there is in them, and they are better than this world and everything in it. He used to hasten to offer this prayer in an unparalleled manner, and it was the habit of the Prophet (blessings and peace of Allah be upon him) to make them brief, as it says in al-Sahihayn. The second sunnah prayer is two rak‘ahs after ‘Asr. ‘A’ishah (may Allah be pleased with her) explained how the Prophet (blessings and peace of Allah be upon him) did these two rak‘ahs, as is narrated in Sahih al-Bukhari: The Prophet (blessings and peace of Allah be upon him) used to pray them, but he did not pray them in the mosque, for fear of burdening his ummah. It is narrated in Sahih al-Bukhari from Mu‘awiyah ibn Abi Sufyan (may Allah be pleased with him) that he said: You offer a prayer which, although we stayed close to the Messenger of Allah (blessings and peace of Allah be upon him), we did not see him offer; rather he forbade it – meaning two rak‘ahs after ‘Asr. In order to reconcile between the two reports, it was said that the Prophet (blessings and peace of Allah be upon him) prayed these two rak‘ahs to make up for the sunnah prayer of Zuhr, because he had missed it, then he continued to do that, because when he did a good deed, he would persist in doing it; however, these two rak‘ahs were not regular Sunnah (Sunnah ratibah) prayers. The difference between a regular and a non-regular Sunnah prayer is that the regular prayer is a confirmed Sunnah (Sunnah mu’akkadah) prayer that is connected to the obligatory prayers, whether it is done before or after the obligatory prayer, whereas the non-regular Sunnah prayer is a prayer that the Prophet (blessings and peace of Allah be upon him) did not enjoin or encourage people to do, but the Sahabah (may Allah be pleased with them) narrated it from him in word and deed, as in the case of two rak‘ahs after ‘Asr..