He who comes sooner shall mill/grind sooner.
More Czech Proverbs:
He who has not been given brains from above will not buy them at the apothecary.Czech
After a battle, everyone is a general.
Czech
There are no cakes without work.
Czech
It is better not to begin than, having begun, leave unfinished.
Czech
Nothing seems expensive on credit.
Czech
The first sin makes the bed for the second.
Czech