His saying: "A company from the former peoples, and a company from the latter ones." "Thullah" (a company) means: a group.
Tafsir of Surat al-Waqi'ah from verse 41 to verse 56.
قَوْله: ﴿ثُلَّةٌ مِنَ الأَوَّلِينَ وَثُلَّةٌ من الآخرين﴾ الثلَّة: الطَّائِفَة.
تَفْسِير سُورَة الْوَاقِعَة من الْآيَة ٤١ إِلَى الْآيَة ٥٦.