Musannaf Ibn Abi Shayba 21:63

Ibn ‘Uyaynah narrated to us, from ‘Amr, from Yahya ibn Ja‘dah, who said: Abu Bakr said: I heard the Messenger of Allah (may Allah bless him and grant him peace) in the first year, while the covenant was recent, saying: "Ask Allah for well-being (al-‘afiyah) and certainty (al-yaqin)."