'Retain' in the Bible

And behold, one after the likeness of the sons of men touched my lips; and I opened my mouth and spoke, and said unto him that stood before me, My lord, by reason of the vision my pains are turned upon me, and I retain no strength.

And after the course of years they shall join affinity; and the king's daughter of the south shall come to the king of the north to make equitable conditions: but she shall not retain the strength of her arm; neither shall he stand, nor his arm; and she shall be given up, she and they that brought her, and he that begat her, and he that strengthened her in those times.