Imam al-Ghazali's astaghfaar surely touch the hearts of all readers.
"We ask forgiveness of Allah (Exalted is He!) for every stumbling on our part and for every slip of the pen in this and all our other books.
We ask His forgiveness for those of our words which have not been matched by our deeds.
We ask His forgiveness for the claims and professions of knowledge and insight into his religion which we have made despite our insufficiencies therein.
We ask His forgiveness for every science we have acquired and every action which we have undertaken for His noble sake, but which was then commingled with something else.
We ask His forgiveness for every covenant we made within ourselves but which we then fell short of fulfilling.
We ask His forgiveness for every blessing which He bestowed upon us but which we employed in disobedience to Him.
We seek His forgiveness for having declared or implied the shortcomings or the inadequacy of anyone.
And we ask His forgiveness for every passing notion which induced us to dissemble or be mannered for the sake of playing up to others, in any book which we have written, or any discourse which we have delivered, or any science which we have profited or profited from.
And after having asked His pardon for all these things, for ourselves and for whomsoever reads this book of ours, or copies it, or listens to it, we ask that He should honour us with His forgiveness and mercy, and overlook the entirety of our sins, both evident and concealed.
For all-encompassing is His generosity, all-abundant is His mercy, and His grace overflows upon all that He has made. And we who are of His making, find no path to Him but that which lies through His grace and munificence". (The Remembrance of Death, p. 252-253; Ihya', vol IV, p. 578).
This is his final dua.
"It is our hope that He will not deal with us as we deserve, but will rather grant us that which is appropriate to Him, in His generosity, abundant indulgence, and mercy". (Ihya', Vol IV, p. 582)