"I said: 'O Messenger of Allah, teach me a supplication from which I may benefit.' He said: 'Say: Allahumma 'afini min sharri sam'i, wa basari, wa lisani, wa qalbi, wa sharri mani (O Allah, protect me from the evil of my hearing, my seeing, my tongue and my heart, and the evil of my sperm.)" - Meaning his sexual organ. (Using translation from Nasāʾī 5484)
قُلْتُ يَا رَسُولَ اللهِ عَلِّمْنِي دُعَاءً أَنْتَفِعُ بِهِ قَالَ قُلِ اللهُمَّ عَافِنِي مِنْ شَرِّ سَمْعِي وَنَفْسِي وَلِسَانِي وَقَلْبِي وَشَرِّ مَنِيِّي يَعْنِي ذَكَرَهُ