good words and good deeds
A yojijukugo (four-character idiom) praising both virtuous speech and virtuous conduct. Formal and literary; rarely used in everyday conversation.
His life was truly a series of good words and good deeds.
Striving for good words and good deeds is the path to improving one's character.
言行一致 means 'consistency between words and actions', while 嘉言善行 specifically praises the goodness of both words and deeds.
A yojijukugo composed of 嘉 (good, fine), 言 (words), 善 (good, virtuous), and 行 (deeds). The exact historical origin is uncertain, but it follows a common classical Chinese pattern of pairing virtuous speech with virtuous action.