C. F. Keil and Franz Delitzsch on Daniel 7:16

Dan 7:16

Daniel turned himself towards an angel who stood by, with a request for an explanation of these things. One of them that stood by refers to those mentioned in Dan 7:10, who stood around the throne of God; whence it is obvious that the vision is still continued. אבעא is not the preterite, I asked him, but the subjunctive, that (ו) I might ask. So also יהודענּני is to be taken with the  וgoing before: he spake to me, that he informed me, namely by his speaking.