Fear injustice, for indeed, injustice will be excessive darkness on the Day of Judgment. And fear miserliness, for it destroyed those who were before you. [Muslim]
"«اتقوا الظلم, فإن الظلم ظلمات يوم القيامة, واتقوا الشُّحَ؛ فإنه أَهْلَكَ من كان قبلكم». [رواه مسلم.]
