With accent marks:
Вода́ ка́мень то́чит.
Water wears away a stone.
Even if you act with little effort but constantly and persistently, you can achieve a lot.
The English equivalents of this Russian proverb are: Little strokes fell great oaks, Drop by drop the sea is drained, Water dripping day by day wears the hardest rock away, Water breaks down a mountain.
Other Russian proverbs
Some to the forest, some for firewood.
Everything has its time.
All is well that ends well.
We got what we fought for.
If you like sledding, you should like to carry the sled.
There are no friends for taste and color.
Strike the iron while it's hot.
A bad example is contagious.