فلانُ فظٌّ غليظٌ

إليكَ عنهُ إليكا

So-and-so is rude and coarse,

About him, about him to you,

لئنْ قضيتَ عليهِ

ليقضيَنَّ عليكا

If you act against him,

He will surely act against you.