one word worth nine sacred tripods (idiom); words of enormous weight
Definitions (粵典–words.hk)
語句
比喻一句説話分量就有如九座鼎咁重。 a metaphor for a solemn promise, or words of great weight; literally: one word (as heavy as) nine tripods
萬貫家財,不如一技在身。滿腹經綸,不如一善在心。高談闊論,不如一言九鼎。長篇累牘,不如一字千金。
万贯家财,不如一技在身。满腹经纶,不如一善在心。高谈阔论,不如一言九鼎。长篇累牍,不如一字千金。
Better be skilful than affluent. Better be virtuous than learned. Better keep every promise than be eloquent. Better be concise than prolific.
Definitions (Wiktionary)
phrase, idiomatic
words of enormous weight; solemn promise or pledge