Is there a Hadith that states: "Ask Allah Almighty for well-being (al-afiyah) and certainty (al-yaqeen)," and is it authentic? And what is the difference between well-being (al-afiyah) and certainty (al-yaqeen)?

"Certainty (Al-Yaqin)" is resolute faith and knowledge, free from doubt. "Well-being (Al-Afiyah) and being made well (Al-Muafah)" mean that Allah protects His servant from illness and affliction. It is reported in the Hadith: "Ask Allah for certainty and well-being, for no one has been given anything better than well-being after certainty."