Cf: Expect nothing from him who promises a great deal (Am.). Great promises and small performances (Br.). Long on promises, short on performance (Am., Br.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.