With accent marks:
Заста́вь дурака́ бо́гу моли́ться – он и лоб расшибёт.
Make a fool pray to God - he will break his forehead.
This proverb is about a stupid person who, being too zealous, only harms the cause.
The proverb originates from the customs of the Orthodox Church. During prayer, believers give obeisances to the earth, trying to touch the floor in the temple by the forehead.
A fool, from excessive diligence, can bow so hard that his forehead will also be smashed against a stone floor.
Other Russian proverbs
Fear has big eyes.
Repetition is the mother of learning.
Each sandpiper praises its swamp.
Forewarned is forearmed.
Оne can not see the wood for the trees.
A titmouse in hands is better than a crane in the sky.
A fisherman sees a fisherman from afar.
A bad example is contagious.