Isaiah 40:28-31, 41:9-14:
Do you not know? Have you not heard? The Everlasting God, the LORD, the Creator of the ends of the earth does not become weary or tired. His understanding is inscrutable. He gives strength to the weary, and to him who lacks might He increases power. Though youths grow weary and tired, and vigorous young men stumble badly, yet those who wait for the LORD will gain new strength; they will mount up with wings like eagles, they will run and not get tired, they will walk and not become weary... You whom I have taken from the ends of the earth, and called from its remotest parts and said to you, 'You are My servant, I have chosen you and not rejected you. 'Do not fear, for I am with you; do not anxiously look about you, for I am your God I will strengthen you, surely I will help you, surely I will uphold you with My righteous right hand.' "Behold, all those who are angered at you will be shamed and dishonored; those who contend with you will be as nothing and will perish. "You will seek those who quarrel with you, but will not find them, those who war with you will be as nothing and non-existent. "For I am the LORD your God, who upholds your right hand, who says to you, 'Do not fear, I will help you.' "Do not fear, you worm Jacob, you men of Israel; I will help you," declares the LORD, "and your Redeemer is the Holy One of Israel."