Custom is stronger than law.
More Russian Proverbs:
A virgin's heart is a dark forest.Russian
A drop of water in the eyes of the Tsar costs the country many handkerchiefs.
Russian
A field in common is always ravaged by bears.
Russian
When money speaks, the truth keeps silent.
Russian
A day is long, but a lifetime is short.
Russian
When you are in a pack of hounds, you either bark or wag your tail.
Russian