سُوْرَةُ الْكَهْفِ

Surah Al-Kahf (18) — Ayah 12

The Cave · Meccan · Juz 15 · Page 294

ثُمَّ بَعَثْنَـٰهُمْ لِنَعْلَمَ أَىُّ ٱلْحِزْبَيْنِ أَحْصَىٰ لِمَا لَبِثُوٓا۟ أَمَدًا ﴿12﴾
Then We raised them up (from their sleep), that We might test which of the two parties was best at calculating the time period that they had tarried.
ثُمَّ thumma Then
بَعَثْنَـٰهُمْ baʿathnāhum We raised them up
لِنَعْلَمَ linaʿlama that We make evident
أَىُّ ayyu which
ٱلْحِزْبَيْنِ l-ḥiz'bayni (of) the two parties
أَحْصَىٰ aḥṣā best calculated
لِمَا limā for what
لَبِثُوٓا۟ labithū (they had) remained
أَمَدًۭا amadan (in) time

Tafsir Ahsan al-Bayan is a well-known Quran commentary by Hafiz Salahuddin Yusuf, a renowned Salafi (Ahl al-Hadith) scholar from Pakistan. This tafsir explains the meanings of the Quran in accordance with the methodology of the Salaf (early righteous generations), relying on authentic sources and straightforward language. Due to its reliability and adherence to sound Islamic scholarship, the Saudi government publishes and distributes this tafsir among the Hujjaj (pilgrims) visiting the Haramain. The tafsir is originally written in Urdu, translated to English by tohed.com.

12. 1. By these two groups are meant the people who differed. These were either the people of that era among whom there was disagreement about them, or the believers and disbelievers of the time of the Messenger are meant, and some say that these are the People of the Cave themselves who became two groups. One said that we slept for such a long period, the other denied this and mentioned a period more or less than the first group.