«وَلَا أَسْمَحُ بِمُوَاسَاتِي لِمَنْ يَفْرَحُ بِمَسَاءَاتِي»
I do not freely give my sympathy to one who rejoices at my suffering.
Muwāsāt is solidarity, help, or comfort in hardship; masāʾāt refers to troubles and injuries. Their phonetic proximity underscores contrary ideas: one person helps while another takes pleasure in pain.
The line turns on opposed emotional responses. The speaker considers someone who celebrates your distress unsafe as a trusted intimate.