Imam Ahmad recorded in his Musnad that `Ubaydullah bin `Amir said, "`Amir bin Rabi`ah and Sahl bin Hanayf went off together intending to bathe. So they went about their business using coverings (to cover their nakedness). So `Amir removed a cloak of wool that he (Sahl) was using to conceal himself. He (`Amir) said, `I looked at him and my eye fell upon him while he was pouring water on himself bathing. Then I heard a loud splash in the water coming from where he was. So I went to him, and I called him three times, but he did not answer me. So I went to the Prophet and informed him. Then, the Prophet came walking, and he was wading in the water. I can still picture the whiteness of his shins. When he came to Sahl (who was unconscious), he hit him on his chest with his hand and said,

«اللْهُمَّ اصْرِفْ عَنْهُ حَرَّهَا وَبَرْدَهَا وَوَصَبَهَا»

(O Allah! Remove from him its heat, its cold and its pain.) He (Sahl) then stood up, and Allah's Messenger said,

«إِذَا رَأَى أَحَدُكُمْ مِنْ أَخِيهِ، أَوْ مِنْ نَفْسِهِ، أَوْ مِنْ مَالِهِ مَا يُعْجِبُهُ، فَلْيُبَرِّكْ فَإِنَّ الْعَيْنَ حَق»

(If one of you sees in his brother, or himself, or his wealth that which pleases him, then he should ask Allah to bless it, for verily, the evil eye is real.)