Русско-английский словарь пословиц и поговорок
ХВАЛИ ГОРКУ, КАК ПЕРЕВАЛИШЬСЯ
See Не говори "гон", пока не перескочишь (Н)
Cf:Do not shout until you are out of the woods (Am.). Don't halloo (shout) till you are out of the wood (Br.). Don't halloo till you're out of the woods (Am.). Don't whistle before you leap (till you are out of the wood) (Br.). Never crow till you're out of the woods (Am.)