John Gill Commentary Daniel 9:8

"O Lord, to us belongeth confusion of face, to our kings, to our princes, and to our fathers, because we have sinned against thee." — Daniel 9:8 (ASV)

O Lord, to us belongs confusion of face
Which is repeated, to show how much the mind of the prophet was affected with it, and to fix a sense of it in the minds of others; as well as to suggest that he wanted words fully to express that shame that everyone ought to take to themselves; and also in order to introduce what follows.

and that to observe that all ranks and degrees of men were concerned in it: to our kings, to our princes, and to our fathers, because we have
sinned against thee ;

these had each of them sinned against the Lord, by not hearkening to his prophets, who reproved them for their sins, and warned them of their danger, (Daniel 9:6) and therefore had reason to be ashamed of them before him; as well as to observe the low estate in which the royal family, princes, elders, and people in Babylon, were, being exposed to shame and reproach before all the world.