Ephesians 2:12

and ye were at that time without Christ, aliens from the commonwealth of Israel, and strangers to the covenants of promise, having no hope, and without God in the world: but now in Christ Jesus,

1 John 5:18

We know that whosoever is born of God, doth not practise sin: but keepeth himself from it, and the wicked one doth not touch him.

Treasury of Scripture Knowledge

Summary

Neither from a stranger's hand shall ye offer the bread of your God of any of these; because their corruption is in them, and blemishes be in them: they shall not be accepted for you.

Bible References

Because

Ephesians 2:12
and ye were at that time without Christ, aliens from the commonwealth of Israel, and strangers to the covenants of promise, having no hope, and without God in the world: but now in Christ Jesus,
1 John 5:18
We know that whosoever is born of God, doth not practise sin: but keepeth himself from it, and the wicked one doth not touch him.