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
Poor people are inventive.
A well-fed man does not understand a starving one.
If I knew where I would fall, I would lay some straw there.
The demon is not as scary as he is depicted.
You see your friends in the times of trouble.
Eggs don't teach the chicken.
Patience and labor will grind everything.
If you like sledding, you should like to carry the sled.