According to Quran and Sunnah
Hadith - Muwatta 50.1
Yahya related to me from Malik that Muhammad ibn Abi Umama ibn Sahl ibn Hunayf heard his father say, "My father, Sahl ibn Hunayf did a ghusl at al-Kharrar. He removed the jubbah he had on while Amir ibn Rabia was watching, and Sahl was a man with beautiful white skin.
Amir said to him, 'I have never seen anything like what I have seen today, not even the skin of a virgin.'
Sahl fell ill on the spot, and his condition grew worse. Somebody went to the Messenger of Allah and told him that Sahl was ill, and could not go with him. The Messenger of Allah came to him, and Sahl told him what had happened with Amir.
The Messenger of Allah said, 'Why does one of you kill his brother? Why did you not say, "May Allah bless you?" (ta baraka-llah) The evil eye is true. Do wudu from it.'
Amir did wudu from it and Sahl went with the Messenger of Allah and there was nothing wrong with him.
Surahs Al-Falaq and An-Nas
Hadith - At-Tirmidhi, Narrated Abu Sa'id al-Khudri
The Prophet (peace be upon him) used to seek protection against the Jinn and the evil eye till surahs al-Falaq and an-Nas were revealed. After they were revealed he stuck to them and discarded everything beside them.
[Transmitted by Tirmidhi.]