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
There are no friends for taste and color.
When the job is done, you can go for a walk.
One head is good, but two ones are better.
Patience and labor will grind everything.
Do not look at a given horse's teeth.
With a darling, even a hut is a paradise.
There is no bad withouth good.
The quieter you go, the further you'll get.