Sahih Bukhari Volume 4, Book 55, Hadith Number 590.

Narated By Ibn ‘Abbas : The Prophet used to seek Refuge with Allah for Al-Hasan and Al-Husain and say: “Your forefather (i.e. Abraham) used to seek Refuge with Allah for Ishmael and Isaac by reciting the following: ‘O Allah! I seek Refuge with Your Perfect Words from every devil and from poisonous pests and from every evil, harmful, envious eye.'”