The Messenger of Allaah (sal-Allaahu 'alayhe wa sallam) used to commend al-Hasan and al-Husayn to Allaah's protection, saying:

أُعِيذُكُمَا بِكَلِمَاتِ اللَّهِ التَّامَّةِ مِنْ كُلِّ شَيْطَانٍ وَهَامَّةٍ، وَمِنْ كُلِّ عَيْنٍ لاَمَّةٍ

I seek protection for you in the Perfect Words of Allah from every devil and every beast, and from every envious blameworthy eye.

U'eethukumaa bikalimaatil-laahit-taammati min kulli shaytaanin wa haammatin, wa min kulli 'aynin laammatin.

Al-Bukhari 4/119.