Musannaf Ibn Abi Shayba 21:368

Abu Mu’awiyah narrated to us, from al-A’mash, from Muslim, from Masruq, from ‘Aishah, who said: The Messenger of Allah (may Allah bless him and grant him peace) used to seek refuge with these words: "Remove the harm, O Lord of the people, and heal, for You are the Healer. There is no healing but Your healing, a healing that leaves behind no illness." She said: When the Messenger of Allah (may Allah bless him and grant him peace) became heavy in his illness in which he died, I took his hand and began to wipe it and say them. She said: He pulled his hand away from my hand and said: "O Allah, join me with the Highest Companion." She said: This was the last of what I heard of his speech.