«وَلَا أُصَافِي مَنْ يَأْبَى إِنْصَافِي»
I do not offer wholehearted friendship to someone who refuses me fair treatment.
Uṣāfī means maintaining sincere friendship; inṣāfī is fair treatment toward me. Their sound correspondence joins feeling to conduct. The speaker refuses wholehearted intimacy where the other person rejects justice.
This does not supply an unconditional rule for ending every relationship over any disagreement. The complaint is specifically about refusing fairness while claiming closeness.
Sincerity is relational; justice is the conduct against which it can be tested.