Cf: Catch before hanging (Am.). Don't clean your fish before you catch it (Am.). Don't sell the bear's skin before you have caught the bear (you've caught him) (Br.). Gut no fish till you get them (Br.). Make not your sauce till you have caught your fish (Am.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.