It's hypocritical to say one thing and do another.

言行不符就是伪善.

《简明英汉词典》

His practice does not consort with his preaching.

他的言行不符.

《现代英汉综合大词典》

His behavior does not consort with his beliefs.

他言行不符.

辞典例句

When the heads of memory and the actual words and deeds match is struck dead!

当脑袋里的记忆与实际的言行不符,就是一刀毙命!

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