Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafseer Al Saadi - Arabic tafsir for Surah As-Saffat — Ayah 63
إِنَّا جَعَلۡنَٰهَا فِتۡنَةٗ لِّلظَّٰلِمِينَ ٦٣
}إِنَّا جَعَلْنَاهَا فِتْنَةً } أي عذابا ونكالا { لِلظَّالِمِينَ } أنفسهم بالكفر والمعاصي.