REPENTING & ALLAH'S MERCY
Anas (radhiallahu anhu) said that he heard the Messenger of Allah (sallallahu alaihi wa-sallam) say:
"Allah the Exalted said:
"O son of Adam! As long as you invoke Me and plead to Me, I will forgive you whatever you have committed, and I will not make much of it.
O son of Adam! If your evil deeds reach the borders of the sky, and then you ask Me for forgiveness, I will forgive you.
O son of Adam! If you bring forth the earth full of errors, then you meet Me while you do not associate anything (or anyone) with Me, I will bring forth for you its full of forgiveness."
[At-Tirmidhee -Hadith]