Ezra 8:21-23

So Ezra had been on the verge of sending a message asking for military escort, but suddenly he says, "I can't do that because of what I've already said to the king about the power of my God." So he had told the king that they were going on a dangerous trip. And the king replied, "Do you think that's wise?" To which Ezra replied, "It will be all right." And then the king said, "What if the enemies attack you?" To which Ezra countered, "All will be well." So Ezra had said to the pagan king, "The hand of our God is upon all those for good who seek Him. We are children of God and our God is almighty."

But Ezra was human. And later, a temporary feeling of fear arose and Ezra almost gave in, but he says, "I can't ask for the soldiers. I'm one of God's people, and I have told the king so, and I've claimed great things in the name of God. Okay then, we don't ask for troops. We call for a fast instead, get back in contact with God, and then set out."