«لِأَعْلَقَ مِنْهُ بِمَا يَكُونُ لِي زِينَةً بَيْنَ الْأَنَامِ»
So that I might acquire from it something that would adorn me among people.
Al-Ḥārith seeks literary knowledge as a mark of refinement and distinction among people. The term zīnah makes learning a form of social adornment.
The episode tests poetic judgement, improvisation and apt expression. Eloquence is evaluated through performance and meaning, not merely ornamental words.