2 Corinthians 6:17-18

So, come out from among [unbelievers], and separate (sever) yourselves from them, says the Lord, and touch not [any] unclean thing; then I will receive you kindly and treat you with favor, [Isa. 52:11.] And I will be a Father to you, and you shall be My sons and daughters, says the Lord Almighty. [Isa. 43:6; Hos. 1:10.]