Surah At-Tawbah 9:45

إِنَّمَا يَسْتَـْٔذِنُكَ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱللَّهِ وَٱلْيَوْمِ ٱلْـَٔاخِرِ وَٱرْتَابَتْ قُلُوبُهُمْ فَهُمْ فِى رَيْبِهِمْ يَتَرَدَّدُونَ

Only those would ask permission of you who do not believe in Allāh and the Last Day and whose hearts have doubted, and they, in their doubt, are hesitating.

Translation: Saheeh International

Tafsir

They alone ask leave of you to stay behind who do not believe in God and the Last Day and whose hearts are doubtful uncertain about religion so in their doubt they waver they are confused.

Excerpt from Tafsir al-Jalalayn, commentary on 9:45, via Quran.com. The reader has the full commentary and 9 more tafsirs.