Surah An-Nur 24:7

وَٱلْخَـٰمِسَةُ أَنَّ لَعْنَتَ ٱللَّهِ عَلَيْهِ إِن كَانَ مِنَ ٱلْكَـٰذِبِينَ

And the fifth [oath will be] that the curse of Allāh be upon him if he should be of the liars.

Translation: Saheeh International

Tafsir

and a fifth time that God’s wrath shall be upon him if he were lying in this the predicate of the subject fa-shahādatu ahadihim ‘then the testimony of one of them’ is the implicit ‘will spare him the prescribed legal punishment for false accusation’.

Excerpt from Tafsir al-Jalalayn, commentary on 24:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.