فَعَلْتُI did خَيْرَاًgood بِقَوْمٍto some people
فَعَلْتُ خَيْرَاً بِقَوْمٍ
فَعَامَلُونِيand they treated me بِضَيْرِwith harm
فَعَامَلُونِي بِضَيْرِ
I showed kindness to some people,
And they treated me ill.
فَلاso do not تَلُمْنِيblame me إِذَاif مَاemphatic particle
فَلا تَلُمْنِي إِذَا مَا
أَصْبَحْتُI have come to أَلْعَنُI curse خَيْرِيmy kindness
أَصْبَحْتُ أَلْعَنُ خَيْرِي
So do not blame me if
I have come to curse my kindness.