14 Do not be unequally yoked together with unbelievers. For what fellowship has righteousness with unrighteousness? What communion has light with darkness? 15 What agreement has Christ with Belial? Or what part has he who believes with an unbeliever? 16 What agreement has the temple of God with idols? For you are the temple of the living God. As God has said: “I will live in them and walk in them. I will be their God, and they shall be My people.”[b] 17 Therefore, “Come out from among them and be separate, says the Lord. Do not touch what is unclean, and I will receive you.”[c] 18 “I will be a Father to you, and you shall be My sons and daughters, says the Lord Almighty.

2 Corinthians 6-7:1
15 Do not love the world or anything in the world. If anyone loves the world, love for the Father[d] is not in them. 16 For everything in the world—the lust of the flesh, the lust of the eyes, and the pride of life—comes not from the Father but from the world. 17 The world and its desires pass away, but whoever does the will of God lives forever. 1 JOHN 2
4 You adulterers and adulteresses, do you not know that the friendship with the world is enmity with God? Whoever therefore will be a friend of the world is the enemy of God. JAMES 4