'Son' in the Bible

"I continued to observe the night vision and look! someone like the Son of Man was coming, accompanied by heavenly clouds. He approached the Ancient of Days and was presented before him.

"As he approached where I was standing, I became terrified and fell on my face. But he told me, "Son of man, understand that the vision pertains to the time of the end.'

"In the first year of the reign of Darius son of Ahasuerus, a descendant of the Medes, who was made king over the kingdom of the Chaldeans