I said, "Messenger of Allah, teach me a supplication that will benefit me."He said, "Say, Allah, protect me from the evil of my hearing, my sight, my tongue, my heart, and the evil of my semen," meaning his private part.
أخبرنا عبيد بن وكيع بن الجراح قال حدثنا أبي عن سعد بن أوس عن بلال بن يحيى
قلت يا رسول الله علمني دعاء أنتفع به قال قل اللهم عافني من شر سمعي وبصري ولساني وقلبي ومن شر منيي يعني ذكره
[Its isnad is hasan] It has already been mentioned, no. 5446, and it is in Kubra, no. 7891.