practice what one preaches

(idiom) do what one advises others to do

Example Sentences:

A: I think you need to lose weight, my friend. You look to fat.
B: You weigh 300 kilos!
A: I know. So what?
B: You need to practice what you preach.

My mother told me not to drink alcohol, but she drinks every night. She needs to practice what she preaches.

From the Blogs:

Working On a Full House: Practice what you Preach!

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