"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  

"I came to the Prophet [SAW] and said: 'O Prophet of Allah, teach me words by means of which I may seek refuge with Allah.' He took me by the hand and said: 'Say: A'udhu bika min sharri sam'i, wa sharri basari, wa sharri lisani, wa sharri qalbi, wa sharri mani (I seek refuge with You from the evil of my hearing, the evil of my seeing, the evil of my tongue, the evil of my heart, and the evil of my sperm).'" (Using translation from Nasāʾī 5444)  

أَتَيْتُ النَّبِيَّ ﷺ فَقُلْتُ يَا رَسُولَ اللهِ عَلِّمْنِي تَعَوُّذًا أَتَعَوَّذُ بِهِ فَأَخَذَ بِيَدِي ثُمَّ قَالَ قُلْ أَعُوذُ بِكَ مِنْ شَرِّ سَمْعِي وَشَرِّ بَصَرِي وَشَرِّ لِسَانِي وَشَرِّ قَلْبِي وَشَرِّ مَنِيِّي قَالَ حَتَّى حَفِظْتُهَا قَالَ سَعْدٌ وَالْمَنِيُّ مَاؤُهُ