'Shrewd' in the Bible

“Behold, I send you out as sheep in the midst of wolves; so be shrewd as serpents and innocent as doves.

And his master praised the unrighteous manager because he had acted shrewdly; for the sons of this age are more shrewd in relation to their own kind than the sons of light.

It was he who took shrewd advantage of our race and mistreated our fathers so that they would expose their infants and they would not survive.