﴿ وَمَن يَفْعَلْ ذَٰلِكَ عُدْوَٰنًۭا وَظُلْمًۭا فَسَوْفَ نُصْلِيهِ نَارًۭا ۚ وَكَانَ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرًا ﴾

“And as for him who does this with malicious intent and a will to do wrong - him shall We, in time, cause to endure [suffering through] fire: for this is indeed easy for God.”

After that, the next verse (30) says: وَمَن يَفْعَلْ ذَٰلِكَ عُدْوَانًا وَظُلْمًا فَسَوْفَ نُصْلِيهِ نَارً‌ا . It means: If, despite the instructions of the Holy Qur'an, anyone acts otherwise, and knowingly, aggressively and unjustly, takes what belongs to someone else, or kills anyone unjustly, Allah will cast him into Fire. Here, the restriction of 'aggression' and 'injustice' shows that, should this happen out of forgetfulness or mistake, it is not included in this warning.