Nahj al-Balāgha
Hadith 147وَمِنْهُمُ المُصْلِتُ لِسَيْفِهِ، وَالمُعْلِنُ بِشَرِّهِ، وَالُمجْلِبُ بِخَيْلِهِ وَرَجِلِهِ قَدْ أَشْرَطَ نَفْسَهُ وَأَوْبَقَ دِينَهُ لِحُطَامٍ يَنْتَهِزُهُ أَوْ مِقْنَبٍ يَقُودُهُ، أَوْ مِنْبَرٍيَفْرَعُهُ وَلَبِئْسَ المَتْجَرُ أَنْ تَرَى الدُّنْيَا لِنَفْسِكَ ثَمَناً، وَمِمَّا لَكَ عِنْدَاللهِ عِوَضاً!
Then there is he who has drawn his sword, openly commits mischief, has collected his horsemen and foot-man and has devoted himself to securing wealth, leading troops, rising on the pulpit and has allowed his faith to perish. How bad is the transaction that you allow, (enjoyment of) this world to be a price for yourself as an alternative for what there is with Allāh for you.