When you point a finger at someone remember there are three fingers pointing back at you.

Native American or Japanese Proverb

In a Navajo court of law, the judge will admonish you for pointing and remind you that when you point a finger, there are three fingers pointing back at you. Among the Navajo, it has always been so.

Confirmation of Source: Quora Answer / Originally Heard in Podcast
Photo Source: Mario Klassen