言有盡而意無窮 [－－尽－－无穷]

Jyutping jin4 jau5 zeon6 ji4 ji3 mou4 kung4
Pinyin yán yǒu jìn ér yì wú qióng

Definitions (Wiktionary)

phrase, idiomatic, of poetry or prose
there's an end to the words, but not to their message