Sayyīdunā Abū Sa’īd Khudrī raziallahu tala anhu  has reported that the Holy Prophet sallallahu alaihi wasallam
evil eye of Jinns and humans to such an extent that Sūraĥ Falaq and Sūraĥ Nās were revealed. Then the Holy Prophet sallallahu alaihi wasallam used to seek refuge against the (adopted these and left the others. (Sunan-ut-Tirmiżī, pp. 13, vol. 4, Ḥadīš 2065)Ḥakīm-ul-Ummaĥ, Muftī Aḥmad Yār Khān wrote in explanation of this Ḥadīš, ‘That is, before the revelation of Sūraĥ Falaq and Sūraĥ Nās, the Beloved and Blessed Prophet sallallahu alaihi wasallamto perform various supplications forprotection against the evil eye of Jinns and humans, for example auzu billahil jaanna etc., then (after the revelation of Sūraĥ Falaq 
Image result for surah naas  and Sūraĥ Nās) he -sallallahu alaihi wasallamof other invocations and commenced repeated use of Sūraĥ 
Falaq and Sūraĥ Nās for (spiritual) exercise.’ (Mirāt-ul Manājīḥ, 
*( abandoned frequent recital pp. 245, vol. 6)