Do you see anywhere in the Scriptures, after Christ's death, that one asks God to forgive him? No, He did that at the cross. He knew our future sins as well as our past, and forgave them all. To ask forgiveness again is to re-crucifies the Savior. We are asking Him to repeat something that He already did.
We do, however, repent but this does not have the meaning that one might think. Its definition is: to rethink, reconsider or think differently. (Strongs)
Repent is to rethink what has been done, nothing more.
