Alliance and Society with the Enemies of God are Ruinous to Spiritual Interest
Source: TTT
Proverbs 29:24
A partner to a thief hates his own soul; he receives the oath, but does not testify.
Hebrews 12:14, 15
Pursue peace with everyone, as well as holiness, without which no one will see the Lord. / See to it that no one falls short of the grace of God, and that no root of bitterness springs up to cause trouble and defile many.
2 Peter 3:17
Therefore, beloved, since you already know these things, be on your guard so that you will not be carried away by the error of the lawless and fall from your secure standing.