«لَا طَالِبَ عِلْمٍ مُهْمِلٌ» = No student of knowledge is negligent.
lā: generic negation.
ṭāliba: accusative construct noun of lā.
ʿilmin: genitive complement.
muhmilun: nominative predicate of lā.
This is an added teaching example, not a quotation from the source.