Surah Al-Ahzab 33:40
مَّا كَانَ مُحَمَّدٌ أَبَآ أَحَدٍ مِّن رِّجَالِكُمْ وَلَـٰكِن رَّسُولَ ٱللَّهِ وَخَاتَمَ ٱلنَّبِيِّـۧنَ ۗ وَكَانَ ٱللَّهُ بِكُلِّ شَىْءٍ عَلِيمًا
Muḥammad is not the father of [any] one of your men, but [he is] the Messenger of Allāh and seal [i.e., last] of the prophets. And ever is Allāh, of all things, Knowing.
Translation: Saheeh International
Tafsir
Muhammad is not the father of any man among you he is not Zayd’s biological father and so it is not unlawful for him to marry his former wife Zaynab after him; but he is the Messenger of God and the Seal of the Prophets and so he will not have a son that is a fully grown man to be a prophet after him a variant reading …
Excerpt from Tafsir al-Jalalayn, commentary on 33:40, via Quran.com. The reader has the full commentary and 9 more tafsirs.