Ephesians 2:12

remember that you were at that time separate from Christ, excluded from the commonwealth of Israel, and strangers to the covenants of promise, having no hope and without God in the world.

1 John 5:18

We know that anyone born of God does not sin; but he who was born of God keeps him, and the evil one does 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
remember that you were at that time separate from Christ, excluded from the commonwealth of Israel, and strangers to the covenants of promise, having no hope and without God in the world.
1 John 5:18
We know that anyone born of God does not sin; but he who was born of God keeps him, and the evil one does not touch him.