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
Some to the forest, some for firewood.
Where there is no fish even a crayfish is a fish.
We don't appreciate what we have but we cry when we lose it.
A well-fed man does not understand a starving one.
Live for a century, learn for a century, but die being a fool anyway.
Beast runs towards the hunter.
A holy place is never empty.
If you are chasing two hares at once, you won’t catch a single one.