﴿ ۞ إِنَّمَا ٱلسَّبِيلُ عَلَى ٱلَّذِينَ يَسْتَـْٔذِنُونَكَ وَهُمْ أَغْنِيَآءُ ۚ رَضُوا۟ بِأَن يَكُونُوا۟ مَعَ ٱلْخَوَالِفِ وَطَبَعَ ٱللَّهُ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَعْلَمُونَ ﴾

“Only they may rightly be reproached who asked thee for exemption even though they were fully able [to go to war]. They were well-pleased to remain with those who were left behind -wherefore God has sealed their hearts, so that they do not know [what they are doing].”

The way of blame is only against those who ask leave of you to stay behind when they are rich. They are content to be with those who stay behind and God has set a seal on their hearts so that they do not know a similar statement has already been made.