2 Corinthians 6:14: "Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?"

2 Corinthians 6:15: "And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?"

2 Corinthians 6:16: "And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people."

2 Corinthians 6:17: "Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,"

Romans 16:17: "Now I beseech you, brethren, mark them" [Unbelievers] "which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them."

Romans 16:18: "For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple."