Где работают, там густо, а в ленивом доме - пусто

Where you have industrious people there is wealth, whereas idlers are poor. See Где мед, там и пчелы (Г)

Cf: Не becomes poor that deals with a slack hand, but the hand of diligence makes rich (Am.). Не who works with a slack hand becomes poor (Am.). No bees, no honey; no work, no money (Am., Br.)