1 Corinthians 5:10; 1 Corinthians 7:14; 1 Corinthians 15:14-15; 1 Corinthians 15:18

10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.
14 For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy.
14 And if Christ be not risen , then is our preaching vain, and your faith is also vain. 15 Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up , if so be that the dead rise not.
18 Then they also which are fallen asleep in Christ are perished .