Isaiah 40:29-31 New English Translation (NET)

29. He gives strength to those who are tired;to the ones who lack power, he gives renewed energy.

30. Even youths get tired and weary;even strong young men clumsily stumble.

31. But those who wait for the Lord’s help find renewed strength;they rise up as if they had eagles’ wings,they run without growing weary,they walk without getting tired.

Isaiah 40