cf famous episode in the fictional Romance of Three Kingdoms 三國演義|三国演义 in which Liu Bei 劉備|刘备 recruits Zhuge Liang 諸葛亮|诸葛亮 (the Hidden Dragon 臥龍|卧龙) to his cause by visiting him three times
Definitions (粵典–words.hk)
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Definitions (Wiktionary)
phrase, figuratively, idiomatic
to sincerely and repeatedly request someone to take up a post (syn.) 三顧草廬, 三顾草庐