Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Uqbah (may Allah be pleased with him), he says that the Messenger of Allah (peace and blessings of Allah be upon him) said to me: "Recite the Mu'awwidhat Surahs (i.e., Surah Al-Falaq and Surah An-Naas) after every prayer."