And the fifth [oath will be] that the curse of Allah be upon him if he should be among the liars.
The Saheeh International Quran Translation
وَٱلْخَٰمِسَةُ أَنَّ لَعْنَتَ ٱللَّهِ عَلَيْهِ إِن كَانَ مِنَ ٱلْكَٰذِبِينَAnd the fifth [oath will be] that the curse of Allah be upon him if he should be among the liars.