Commentary explaining the meaning of the ayahs. One passage often covers several ayahs, so neighbouring ayahs can show the same text.
Tafsir Jalalayn tafsir for Surah Sad — Ayah 83
إِلَّا عِبَادَكَ مِنۡهُمُ ٱلۡمُخۡلَصِينَ ٨٣
(Kecuali hamba-hamba-Mu yang mukhlis di antara mereka") yakni orang-orang yang beriman.