With accent marks:
Друзья́ познаю́тся в беде́.
You see your friends in the times of trouble.
This proverb is about a true friendship. It often happens in life that people have many friends who only call themselves friends. But should a disaster happen, only a few of them are ready to help.
The closest English equivalent is: "A friend in need is a friend indeed".
Other Russian proverbs
A bird is visible by its flight.
Put your trust in God, but don't make mistakes yourself
(lit.) Whoever gets up early, God gives him
Don't go to the woods if afraid of wolves.
A bad example is contagious.
The beauty of a debt is its payment
Crowded, but not aggrieved.
Appetite comes with eating.