Sunan Abu-Dawud, Book 8, Number 1546:
Quote:
Narrated Shakl ibn Humayd:
I said: Apostle of Allah, teach me a supplication.
He said: Say: "O Allah, I seek refuge in Thee from the evil of what I hear, from the evil of what I see, from the evil of what I speak, from the evil of what I think, and from the evil of my semen".