'Cannot' in the Bible

Then Samuel said to Jesse, "Is that all of the young men?" Jesse replied, "There is still the youngest one, but he's taking care of the flock." Samuel said to Jesse, "Send and get him, for we cannot turn our attention to other things until he comes here."

He said to him, "Don't be afraid! For the hand of my father Saul cannot find you. You will rule over Israel, and I will be your second in command. Even my father Saul realizes this."