A drop in the sea.
More Russian Proverbs:
Money is like down -- one puff and it's gone.Russian
If you go to war pray once; if you go on a sea journey pray twice; but pray three times when you are going to be married.
Russian
Better to stumble than make a slip of the tongue.
Russian
You can't have two forenoons in the same day.
Russian
Accidents will happen in the best-regulated families.
Russian
A wise man sees only water in the tears of a woman.
Russian