Committing oppression

And surely those who are unjust shall have a punishment besides that (in the world), but most of them do not know. 52:47

The blameworthy are those who oppress their fellow men and conduct themselves with wickedness and injustice in the land. It is they who will have painful punishment. 42:42

 
Meaning:-
oppression: prolonged cruel or unjust treatment or control.
Oppress: abuse, to burden with cruel or unjust impositions
Wickedness: the quality of being evil or morally wrong.