'Retain' in the Bible

And I myself, Daniel, alone saw this great vision, and [as a result] {no strength was left in me} and {my complexion grew deathly pale}, and I did not retain any strength.

And at [the] end of [some] years they will make an alliance, and the daughter of the king of the south will come to the king of the north to make a peace treaty, but {she will not retain her position of power}, and his offspring will not endure, and she will be given up, she and her attendants and her child supporting her, in those times.