Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafsir Ibne Kathir tafsir for Surah Al-Mutaffifin — Ayah 29
إِنَّ ٱلَّذِينَ أَجۡرَمُواْ كَانُواْ مِنَ ٱلَّذِينَ ءَامَنُواْ يَضۡحَكُونَ ٢٩
Грешники смялись над теми, которые уверовали.