Don't count your chickens before they hatch
man skal ʔekə ɡlɛðə saɪ fʌ tʔiðlʔit
In Danish Man skal ikke glæde sig for tidligt
This idiom is a Danish proverb that warns against celebrating before the task is completed.
Example
"Man skal ikke glæde sig for tidligt, lad os se resultatet først."