'Uncertainty' in the Bible

Peter however, together with the Eleven, stood up and addressed them in a loud voice. "Men of Judaea, and all you inhabitants of Jerusalem," he said, "be in no uncertainty about this matter but pay attention to what I say.

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.