"Al-Mu'awwidhat" the Surah which give protection) are the three Surah of the Qur'an which have been mentioned in this Hadith. They are so named because the request for granting of protection is made to Allah by means of them. The last two Surah of the Qur'an, that is Surat Al-Falaq and Surat An-Nas, are called "Al-Mu'awwidhatain" which means "Two Surah which give protection". One must recite these Surah of the Qur'an before going to sleep so that one may, on the one hand, follow the practice of the Prophet (PBUH), and on the other one, finds the Protection of Allah.