Repentance التوبة
Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said:
Allah Almighty said:
O son of Adam, if you call upon Me and place your hope in Me, I will forgive you despite what is within you and I will not hesitate.
O son of Adam, if you have sins piling up to the clouds and then ask for My forgiveness, I will forgive you without hesitation.
O son of Adam, if you come to Me with enough sins to fill the earth and then you meet Me without associating anything with Me, I will come to you with enough forgiveness to fill the earth.
Source: Sunan al-Tirmidhī 3540, Grade: Hasan