Surah Al-Waqi'ah 56:58

أَفَرَءَيْتُم مَّا تُمْنُونَ

Have you seen that which you emit?

Translation: Saheeh International

Tafsir

Have you considered the sperm that you emit? the sperm you spill in the wombs of women?

Excerpt from Tafsir al-Jalalayn, commentary on 56:58, via Quran.com. The reader has the full commentary and 9 more tafsirs.