And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, and weary themselves to commit iniquity.

Weary themselves to commit iniquity - are at laborious pains to act perversely (Maurer). Sin is a hard bondage (, "Behold, is it not of the Lord of hosts that the people shall labour in the very fire, and the people shall weary themselves for very vanity").

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