'Apostasy' in the Bible

And they have plunged themselves in the corruption of apostasy, but I will be a chastiser of them all.

And they have been informed concerning thee, that thou teachest all the Jews among the nations apostasy from Moses, saying that they should not circumcise their children, nor walk in the customs.

Let not any one deceive you in any manner, because it will not be unless the apostasy have first come, and the man of sin have been revealed, the son of perdition;