With accent marks:
Де́лу вре́мя, поте́хе час.
Time for business, an hour for fun.
This is the expression of the Russian Tsar Alexei Mikhailovich (1629 - 1676) written by him in a book dedicated to falconry.
Meaning: most of the time shoud be dedicated to business (work) and duties, and less time - to entertainment.
It is usually said as a reminder to a person who, having fun, forgets about his duties.
Other Russian proverbs
Without labor, you can not even catch a fish in the pond.
A bad example is contagious.
Strike the iron while it's hot.
Your own shirt is closer to your body.
Do not look at a given horse's teeth.
Don’t wave your fists after the fight.
Measure seven times, cut one.
We don't appreciate what we have but we cry when we lose it.