لَوۡ كَانَ عَرَضٗا قَرِيبٗا وَسَفَرٗا قَاصِدٗا لَّٱتَّبَعُوكَ وَلَٰكِنۢ بَعُدَتۡ عَلَيۡهِمُ ٱلشُّقَّةُۚ وَسَيَحۡلِفُونَ بِٱللَّهِ لَوِ ٱسۡتَطَعۡنَا لَخَرَجۡنَا مَعَكُمۡ يُهۡلِكُونَ أَنفُسَهُمۡ وَٱللَّهُ يَعۡلَمُ إِنَّهُمۡ لَكَٰذِبُونَ
Were it an accessible gain or a short journey, they would have surely followed you; but the distance seemed too far to them. Yet they will swear by Allah: ‘If we could, we would have surely gone forth with you.’ They [merely] destroy themselves. Allah knows that they are indeed liars.
Agha Ali Puya Commentary
Commentary on Quran 9:42
[Pooya/Ali Commentary 9:42] (see commentary for verse 41)