Surah Al-Buruj 85:6
إِذْ هُمْ عَلَيْهَا قُعُودٌ
When they were sitting near it.
Translation: Saheeh International
Tafsir
when they sat by it around the edge of the ditch on chairs
Excerpt from Tafsir al-Jalalayn, commentary on 85:6, via Quran.com. The reader has the full commentary and 9 more tafsirs.