'Age' in the Bible

It happened at the time of Solomon's old age that his wives guided his heart after other gods, and his heart was not fully with Yahweh his God as the heart of David his father [had been].

The wife of Jeroboam did so. She got up, went [to] Shiloh, and came [to] the house of Ahijah. Now Ahijah was not able to see, for {his eyes were fixed} because of his old age.

The remainder of the acts of Asa, all of his achievements, all that he did, and the cities which he built, are they not written in the scroll of the events of the days of the kings of Judah? But at the time of his old age, {he developed a foot disease}.