Abul-Fadl Al-'Abbas bin 'Abdul-Muttalib (May Allah be pleased with him) reported:
I asked the Messenger of Allah ﷺ to teach me a supplication. He ﷺ said, "Beg Allah for safety (from all evils in this world and in the Hereafter)." I waited for some days and then I went to him again and asked him: "O Messenger of Allah Teach me to supplicate something from Allah." He said to me, "O Al-'Abbas, the uncle of Messenger of Allah! Beseech Allah to give you safety (Al-a'fiyah ) in this life and in the Hereafter."

[At- Tirmidhi].

وعن أبي الفضل العباس بن عبد المطلب رضي الله عنه قال: قلت يا رسول الله: علمني شيئًا أسأله الله تعالى، قال: "سلوا الله العافية" فمكثت أيامًا، ثم جئت فقلت: يا رسول الله: علمني شيئًا أسأله الله تعالى، قال لي: "يا عباس يا عم رسول الله سلوا الله العافية في الدنيا والآخرة". ((رواه الترمذي وقال: حديث حسن صحيح)).