لَبِسْتُ الْخَمِيصَةَ أَبْغِي الْخَبِيصَةَ
I put on the khamīṣah garment while seeking khabīṣah, a sweet dish.
Al-khamīṣah / al-khabīṣah are almost alike in sound but name a garment and a sweet food. Abū Zayd sets the respectable outward appearance of dress against the appetite that motivated his conduct.
The difference is comic precisely because the words almost coincide while the objects do not. It is a kind of sound-play, not equivalence of meaning. The confession illuminates character and motive: impressive language and clothing can be enlisted in the pursuit of an ordinary meal.