“I said: ‘O Messenger of Allah, teach me something that I may ask Allah, for.’ He (ﷺ) said: ‘Ask Allah for Al-`Āfiyah.’ Then I remained for a day, then I came and said: ‘O Messenger of Allah, teach me something that I may ask Allah for.’ So he (ﷺ) said to me: “O Abbas, O uncle of the Messenger of Allah! Ask Allah for Al-`Āfiyah in the world and in the Hereafter.”
Jami` at-Tirmidhi Book 48, Hadith 145