Translation of "put (someone's) money where (someone's) mouth is" in Russian

Translations

подкрепить слова делом

If he believes in the project, he should put his money where his mouth is.

Если он верит в проект, он должен подкрепить слова делом.

Definitions

To back up one's words or claims with action or financial commitment, demonstrating that one truly believes in what they are saying.

Words