Isaiah 40:28-30 New Life Version (NLV)
28 Have you not known? Have you not heard? The God Who lives forever is the Lord, the One Who made the ends of the earth. He will not become weak or tired. His understanding is too great for us to begin to know. 29 He gives strength to the weak. And He gives power to him who has little strength. 30 Even very young men get tired and become weak and strong young men trip and fall.