Surah At-Tawbah 9:22

خَـٰلِدِينَ فِيهَآ أَبَدًا ۚ إِنَّ ٱللَّهَ عِندَهُۥٓ أَجْرٌ عَظِيمٌ

[They will be] abiding therein forever. Indeed, Allāh has with Him a great reward.

Translation: Saheeh International

Tafsir

therein they shall abide forever khālidīna is an implied circumstance. Surely with God is a tremendous reward.

Excerpt from Tafsir al-Jalalayn, commentary on 9:22, via Quran.com. The reader has the full commentary and 9 more tafsirs.