Nahj al-Balāgha
Hadith 148وَمِنْهُمْ مَنْ يَطلُبُ الدُّنْيَا بِعَمَلِ الاْخِرَةِ، وَلاَ يَطْلُبُ الاْخِرَةَ بِعَمَلِ الدُّنْيَا، قَدْ طَامَنَ مِنْ شَخْصِهِ، وَقَارَبَ مِنْ خَطْوِهِ، وَشَمَّرَ مِنْ ثَوْبِهِ، وَزَخْرَفَ مِنْ نَفْسِهِ لِلاْمَانَةِ، وَاتَّخَذَ سِتْرَ اللهِ ذَرِيعَةًإِلَى المَعْصِيَةِ
And among them is he who seeks (benefits of) this world through actions meant for the next world, but does not seek (good of) next world through actions of this world. He keeps his body calm (in dignity), raises small steps, holds up his clothes, embellishes his body for appearance of trust-worthiness and uses the position of Allāh’s connivance as a means of committing sins.