Practice what you preach

Meaning: Live according to the principles you advocate.

Origin: The idea comes from Jesus' criticism of the scribes and Pharisees in Matthew 23:3: do as they tell you, "but do not ye after their works: for they say, and do not." The English "practise what you preach" is recorded from the 17th century.

Equivalents in French, Spanish, Japanese, German, Italian, and 2 more languages

French: Il faut prêcher par l'exemple (literally: One must preach by example)
Spanish: Predica con el ejemplo (literally: Preach with the example)
Japanese: 言行一致 (Genkō itchi) (literally: Words and actions in accord)
German: Wasser predigen und Wein trinken (literally: To preach water and drink wine)
Italian: Predicare bene e razzolare male (literally: To preach well and scratch about badly)
Portuguese: Faz o que eu digo, não faças o que eu faço (literally: Do what I say, not what I do)
Chinese: 以身作则 (Yǐ shēn zuò zé) (literally: Make yourself the example)