'A'isha (the wife of Allah's Apostle) (ﷺ) said: When Allah's Messenger (ﷺ) fell ill. Gabriel (ؑ) used to recite these verses. "In the name of Allah. He may cure you from all kinds of illness and safeguard you from the evil of a jealous one when he feels jealous and from the evil influence of eye."
Abu Sa'id reported that Gabriel (ؑ) came to Allah's Messenger (ﷺ) and said: Muhammad, have you fallen ill? Thereupon he said: Yes. He ( Gabriel (ؑ)) said: "In the name of Allah I exercise you from everything and safeguard you from every evil that may harm you and from the eye of a jealous one. Allah would cure you and I invoke the name of Allah for you."
Abu Hurairah (RA) reported so many ahadith from Allah's Messenger (ﷺ) and he reported Allah's Messenger (ﷺ) as saying: The influence of an evil eye is a fact.
Ibn 'Abbas reported Allah's Messenger (ﷺ) as saying: The influence of an evil eye is a fact; if anything would precede the destiny it would be the influence of an evil eye, and when you are asked to take bath (as a cure) from the influence of an evil eye, you should take bath.