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
If you are chasing two hares at once, you won’t catch a single one.
In a healthy body, healthy mind.
(lit.) Whoever gets up early, God gives him
Eggs don't teach the chicken.
Patience and labor will grind everything.
Fear has big eyes.
The beauty of a debt is its payment
The best is the enemy of the good.