Put (one's) money where (one's) mouth is

Перевод put (one's) money where (one's) mouth is на русский язык

If someone believes in the project, they should put their money where their mouth is.

Если кто-то верит в проект, он должен подкрепить слова делом.

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