Daniel 5:13 (ESV)

13 Then Daniel was brought in before the king. The king answered and said to Daniel, “You are that Daniel, one of the exiles of Judah, whom the king my father brought from Judah.

Belshazzar sends for Daniel. He asks Daniel some questions to make sure it is really him and that he had the right man come to him.

And so Daniel appears on the scene once again. He has become an old man. At the beginning of the book, he was about fourteen years old. That was in 605 BC. We are now many years later. It is 539 BC, or about sixty-six years later. Daniel is approximately eighty years old. The Lord gave him this advanced age so that he would serve long in the preservation of God’s people in Babylon. He had to stay alive in order to preserve the church on its way to Christ.