Surah Ash Shu'ara Tafseer

وَلَا تَبْخَسُوا النَّاسَ أَشْيَاءهُمْ

And defraud not people by reducing their things,

means, do not shortchange them.

وَلَا تَعْثَوْا فِي الاَْرْضِ مُفْسِدِينَ

nor do evil, making corruption and mischief in the land.

means, by engaging in banditry.

This is like the Ayah,

وَلَا تَقْعُدُواْ بِكُلِّ صِرَطٍ تُوعِدُونَ

And sit not on every road, threatening, (7:86)

وَاتَّقُوا الَّذِي خَلَقَكُمْ وَالْجِبِلَّةَ الاْاَوَّلِينَ