One son is no son, two sons is no son, but three sons is a son.
More Russian Proverbs:
The wolf is not afraid of the sheepdog, but he is of his chain.Russian
Praying kneads no dough.
Russian
Every seed knows its time.
Russian
Better a fair pair of heels than a halter.
Russian
It will last out our time; if after us no grass grows, what does it matter to us?
Russian
Tell me who's your friend and I'll tell you who you are.
Russian