غَدَرْتَ فلما بانَ غَدْرُكَ جِئْتَنِي

تقدِّرُ أني أَعْذِرُ الخِلَّ في الغدرِ

You betrayed me, and when your betrayal was clear, you came to me

Expecting I'd excuse a friend for their deceit.

فلا تلتمسْ عُذراً فسلتُ بعاذرٍ

أخاً عُذْرُهُ يحتاجُ عندي إلى عُذْر

But do not seek my pardon. I have had enough excuses.

A brother who needs excusing is himself in need of pardon.