Proverbs 18:17-19

Amplified Bible

¹⁷ 
The first one to plead his case seems right,
Until another comes and cross-examines him.
^18 
[a]To cast lots puts an end to quarrels
And decides between powerful contenders.
¹⁹ 
A brother offended is harder to win over than a fortified city,
And contentions [separating families] are like the bars of a castle.