«وَالْبَسْ لِمَنْ فِي وَصْلِهِ لِبْسَةٌ / لِبَاسَ مَنْ يَرْغَبُ عَنْ أُنْسِهِ»
Toward one whose companionship is clouded by pretence, put on the manner of a person who no longer seeks his intimacy.
Libsa signifies ambiguity or confusion; libās is clothing; ilbas is the imperative “wear.” Three related forms create verbal artistry.
The line is not literally recommending a costume change. The garment becomes a metaphor for the outward manner of someone who withdraws from dubious intimacy.