Narrated `Aisha: Whenever Allah's Apostle became sick, he would recite Mu'awwidhat (Surat Al-Falaq and Surat An- Nas) and then blow his breath over his body. When he became seriously ill, I used to recite (these two Suras) and rub his hands over his body hoping for its blessings.

Narrated Aisha: Whenever Allah's Apostle became ill, he used to recite the Muawidhatan (i.e. the last two surahs of the Qur'an) and blow his breath over himself (after their recitation ) and rubbed his hands over his body. So when he was afflicted with his fatal illness. I started reciting the Muawidhatan and blowing my breath over him as he used to do and then I rubbed the hand of the Prophet over his body.

Narrated `Aisha: During the Prophet's fatal illness, he used to recite the Mu'auwidhat (Surat An-Nas and Surat Al- Falaq) and then blow his breath over his body. When his illness was aggravated, I used to recite those two Suras and blow my breath over him and make him rub his body with his own hand for its blessings." (Ma`mar asked Az-Zuhri: How did the Prophet use to blow? Az-Zuhri said: He used to blow on his hands and then passed them over his face.)

Narrated `Aisha: The Prophet, during his fatal ailment used to blow (on his hands and pass them) over his body while reciting the Mu'auwidhat (Surat-an-Nas and Surat-al-Falaq). When his disease got aggravated, I used to recite them for him and blow (on his hands) and let him pass his hands over his body because of its blessing. (Ma`mar asked Ibn Shihab: How did he use to do Nafth? He said: He used to blow on his hands and then pass them over his face.)