ANCIENT OF DAYS. In Dan.7.9, Dan.7.13, Dan.7.22 the reference is to God, as he appeared in a vision to the prophet. See Daniel; Son of Man.
M. Stuart, Commentary on the Book of Daniel (1850), loc. cit.; J. A. Montgomery, “The Book of Daniel,” ICC, (1927), loc. cit.; E. J. Young, The Prophecy of Daniel (1949), 150, 151.
International Standard Bible Encyclopedia (1915)
On `attiq, see Ancient (4). The expression is used in reference to God in Da 7:9,13,22 and is not intended to suggest the existence of God from eternity. It was the venerable appearance of old age that was uppermost in the writer’s mind. "What Daniel sees is not the eternal God Himself, but an aged man, in whose dignified and impressive form God reveals Himself (compare Eze 1:26)" (Keil).