Rashi on the Prophets and Writings
Psalms 129
For forgiveness is with You You did not give permission to an agent to forgive, as it is said (Exod. 23:21): “for he will not forgive your transgression.” in order that You be feared for this, so that no man will rely on the forgiveness of another. (I found this.)
I hoped, O Lord; yea, my soul hoped one hope after another hope, similar to (above 27:14): “Hope for the Lord, be strong and He will give your heart courage, and hope,” and similar to “among those who await the morning, those who await the morning.”
My soul is to the Lord among those who await the morning I am among those who look forward to the redemption. those who await the morning They look forward and repeatedly look forward for one end after another end. (I found this.)
You arrive at the cited line; the whole work is yours to read around it. The text is set from the cited public-domain edition.