'Retain' in the Bible

And behold, one who resembled the sons of men touched my lips. Then I opened my mouth and spoke and said to him who was standing before me, “O my lord, because of the vision anguish has come upon me, and I have retained no strength.

After some years the Syrian king of the North and the Egyptian king of the South will make an alliance; the daughter (Berenice) of the king of the South will come to the king of the North to make an equitable and peaceful agreement (marriage); but she will not retain the power of her position, nor will he retain his power. She will be handed over with her attendants and her father as well as he who supported her in those times.