The Messenger of Allah (may Allah's peace and blessings be upon him) used to prolong the Qur'an's recitation in supererogatory prayers and would sometimes make it brief depending on circumstances and occasions. In this Hadīth, Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (may Allah's peace and blessings be upon him) recited Surat al-Kāfirūn and Surat al-Ikhlās in the regular two-Rak‘ah Sunnah of the Fajr prayer after the recitation of Surat al-Fātihah. This is because they comprise negation of other gods and affirmation of Tawhīd (monotheism), and also, they are two light chapters that suited his brief performance of these two Rak‘ahs, as it was the Prophet's habit to lighten these two Rak‘ahs, as narrated in the Two Sahīh Collections. In the Hadīth: Recitation in the Sunnah of the Fajr prayer after Surat al-Fātihah.