Ephesians 2:12

that you were at that time without Christ, being aliens from the community of Israel, and strangers to the covenants of promise, having no hope, and having no God in the world:

1 John 5:18

We know that whoever has been begotten of God, does not sin: but he that is begotten of God, keeps himself, and the wicked one touches him not.

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
that you were at that time without Christ, being aliens from the community of Israel, and strangers to the covenants of promise, having no hope, and having no God in the world:
1 John 5:18
We know that whoever has been begotten of God, does not sin: but he that is begotten of God, keeps himself, and the wicked one touches him not.