With accent marks:
Не рой я́му друго́му, сам в неё попадёшь.
Do not dig a hole for another one, you will fall into it yourself.
This proverb is very old and has its analogues in many languages. It is also found in the text of the Bible.
Its meaning is very clear: do not cause trouble to another one, the circumstances can turn against you.
Other Russian proverbs
There are no friends for taste and color.
The beauty of a debt is its payment
In a quiet whirlpool, demons live.
The apple never falls far from the tree.
There is no smoke without fire.
Everything has its time.
Make a fool pray to God - he will break his forehead.
Water wears away a stone.