Daniel 9:5

We have sinned -Though Daniel was alone, he spake in the name of the people in general - doubtless recounting the long series of crimes in the nation which had preceded the captivity, and which were the cause of the ruin of the city and temple. And have committed iniquity ... -These varied forms of expression are designed to give “intensity” to what he says. It is equivalent to saying that they had sinned in every way possible. The mind, in a state of true repentance, dwells on its sins, and recounts the various forms in which iniquity has been done, and multiplies expressions of regret and sorrow on account of transgression. From thy precepts -Thy commands; thy laws.