Sunan an-Nasa'i, Book 50, Hadith 67 (In-Book) ⓘ

It was narrated that Abu Sa'eed said: "The Messenger of Allah [SAW] used to seek refuge from the evil eye of the Jinn and the evil eye of humans. When Al-Mu'awwadhatan were revealed, he started to recite them and stopped reciting anything else."

أَخْبَرَنَا هِلاَلُ بْنُ الْعَلاَءِ، قَالَ حَدَّثَنَا سَعِيدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا عَبَّادٌ، عَنِ الْجُرَيْرِيِّ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَتَعَوَّذُ مِنْ عَيْنِ الْجَانِّ وَعَيْنِ الإِنْسِ فَلَمَّا نَزَلَتِ الْمُعَوِّذَتَانِ أَخَذَ بِهِمَا وَتَرَكَ مَا سِوَى ذَلِكَ ‏.‏