Nahj al-Balāgha
Hadith 492وَمَا يَمْنَعُ أَحَدَكُمْ أَنْ يَسْتَقْبِلَ أَخَاهُ بِمَا يَخَافُ مِنْ عَيْبِهِ، إِلاَّ مَخَافَةُ أَنْ يَسْتَقْبِلَهُ بِمِثْلِهِ، قَدْ تَصَافَيْتُمْ عَلَى رَفْضِ الاْجِلِ وَحُبِّ الْعَاجِلِ، وَصَارَ دِينُ أَحَدِكُمْ لُعْقَةً عَلَى لِسَانِهِ، صَنِيعَ مَنْ قَدْ فَرَغَ مِنْ عَمَلِهِ، وَأَحْرَزَ رِضَى سَيِّدِهِ.
Nothing prevents anyone among you to disclose to his comrade the shortcomings he is afraid of, except the fear that the comrade would also disclose to him similar defects. You have decided together on leaving the next world and loving this world. Your religion has become just licking with the tongue. It is like the work of one who has finished his job and secured satisfaction of his master.