'Retain' in the Bible

and who doth retain strength to build to Him a house, for the heavens, even the heavens of the heavens, do not contain Him? and who am I that I do build to Him a house, except to make perfume before Him?

And he seeketh Ahaziah, and they capture him, (and he is hiding himself in Samaria), and bring him in unto Jehu, and put him to death, and bury him, for they said, 'He is son of Jehoshaphat, who sought Jehovah with all his heart;' and there is none to the house of Ahaziah to retain power for the kingdom.