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-Qalam — Ayah 31
قَالُواْ يَٰوَيۡلَنَآ إِنَّا كُنَّا طَٰغِينَ ٣١
﴾قَالُواْيـٰوَيْلَنَآ﴿ «говоря: ‘‘Горе нам! ﴾إِنَّاكُنَّاطَـٰغِينَ﴿ Мы были перешедшими!’’» — т.е. границы дозволенного.