Daniel 8:16

And I heard a man’s voice between the banks of Ulai - See the notes at Daniel 8:2. The voice seemed to come from the river, as if it were that of the Genius of the river, and to address Gabriel, who stood near to Daniel on the shore. This was doubtless the voice of God. The speaker was invisible, and this method of explaining the vision was adopted, probably to make the whole scene more impressive.

Which called, and said, Gabriel - Gabriel is mentioned in the Scriptures only in Daniel 8:16; Daniel 9:21; Luke 1:19, Luke 1:26. In Luke 1:19, he is mentioned as saying of himself, “I am Gabriel, that stand in the presence of God.” The word means, properly, “man of God.” Nothing more is known of him, and he is mentioned only as bearing messages to Daniel, to Zacharias the father of John the Baptist, and to Mary.

Make this man to understand the vision - Explain it to him so that he will under stand its meaning.