Brother in law is a narcissist

A minister told us once in a bible study, when you point a finger at another person there are three pointed at you, so be careful when you judge others. Just bring it to the Lord in prayers and ask Him to be less judgmental of others. It is up to God between that person and Him.
Lord may this person correct what's first wrong with them self before they go starting pointing fingers at others, I pray in Jesus name amen.
Harsh, unforgiving judgment is wrong. We are “always to be gentle toward everyone” (Titus 3:2). It is the merciful who will be shown mercy (Matthew 5:7), and, as Jesus warned, “In the same way you judge others, you will be judged, and with the measure you use, it will be measured to you” (Matthew 7:2).