Narrated 'Aisha:

Whenever the Prophet (ﷺ) went to bed every night, he used to cup his hands together and blow over it after reciting Surat Al-Ikhlas, Surat Al-Falaq and Surat An-Nas, and then rub his hands over whatever parts of his body he was able to rub, starting with his head, face and front of his body. He used to do that three times.

Narrated `Aisha:

Whenever Allah's Messenger (ﷺ) went to bed, he used to recite Surat-al-Ikhlas, Surat-al-Falaq and Surat-an- Nas and then blow on his palms and pass them over his face and those parts of his body that his hands could reach. And when he fell ill, he used to order me to do like that for him.

Narrated Zirr bin Hubaish:

I asked Ubai bin Ka`b regarding the two Muwwidhat (Surats of taking refuge with Allah). He said, "I asked the Prophet (ﷺ) about them, He said, 'These two Surats have been recited to me and I have recited them (and are present in the Qur'an).' So, we say as Allah's Messenger (ﷺ) said (i.e., they are part of the Qur'an."

'Uqba b. 'Amir reported Allah's Messenger (ﷺ) as saying: What wonderful verses have been sent down today. the like of which has never been seen! They are:" Say: I seek refuge with the Lord of the dawn," and" Say: I seek refuge with the Lord of men."