The doer of good will regret
‘Atta ibn Abee Rabah reported that Ibn ‘Abbas (رضي الله عنه) stated:
“Every soul will blame itself on the Day of Judgment.
The doer of good will regret that he did not increase in good deeds, and the sinner will regret that he did not repent from his sins.”
[Ibn Al Qayyim in Ighathatul Lahfaan pg. 105]