John Gill Commentary Daniel 9:20

"And while I was speaking, and praying, and confessing my sin and the sin of my people Israel, and presenting my supplication before Jehovah my God for the holy mountain of my God;" — Daniel 9:20 (ASV)

And while I was speaking and praying Speaking to God in prayer; for it seems his prayer was vocal, and not mental only:

and confessing my sin, and the sin of my people Israel ; Daniel, though so holy and good a man, was not without sin, and thought it his duty to confess it before the Lord; and which he did in the first place, and then the sin of his people; which is the way to succeed with the Lord for the application of pardoning grace, and the enjoyment of other mercies and blessings:

and presenting my supplication before the Lord my God for the holy mountain of my God ; for the temple, and the service of God in it; which was the first and principal thing that lay upon the heart of the prophet, and he was most importunate and solicitous for.