إِنَّمَا يَسْتَأْذِنُكَ الَّذِينَ لاَ يُؤْمِنُونَ بِاللّهِ وَالْيَوْمِ الآخِرِ وَارْتَابَتْ قُلُوبُهُمْ فَهُمْ فِي رَيْبِهِمْ يَتَرَدَّدُونَ
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سورة التوبة
(9/45) Only those would ask permission of you who do not believe in Allah and the Last Day and whose hearts have doubted. So in their doubt do they waver.
Surah At-Tawbah