'Perchance' in the Bible

Then said David to Jonathan, Who shall tell me if perchance thy father answer thee roughly?

that "'They may look and look but not see, and listen and listen but not understand, lest perchance they should return and be pardoned.'"

For this reason I also, when I could no longer endure the uncertainty, sent to know the condition of your faith, lest perchance the Tempter might have tempted you and our labour have been lost.