From Ibn Abbas who said the Messenger of Allaah -sallAllaahu alayhi wa sallam- used to seek refuge for al-Hassan and al-Hussein, he would say:
أعوذ بكلمات الله التامة من كل شيطان وهامة ، ومن كل عين لامة
‘I seek refuge for you two with Allaah’s perfect words from every Shaytaan (devil) and poisonous creature and every evil eye.’
He -sallAllaahu alayhi wa sallam- said that this is how Ibrahim used to seek refuge for Ishaaq and Ismaeel.’
[Collected by Bukhari & Tirmidhi with the extra wording, authenticated by Albaani]