Despair

قُلْ يَا عِبَادِيَ الَّذِينَ أَسْرَفُوا عَلَى أَنفُسِهِمْ لَا تَقْنَطُوا مِن رَّحْمَةِ اللَّهِ إِنَّ اللَّهَ
يَغْفِرُ الذُّنُوبَ جَمِيعًا إِنَّهُ هُوَ الْغَفُورُ الرَّحِيمُ
39:53Qul ya AAibadiya allatheena asrafoo AAala anfusihim la taqnatoo min rahmati Allahi inna Allaha yaghfiru alththunooba jameeAAan innahu huwa alghafooru alrraheemu

(Say: "O my Servants who have transgressed against their souls! Despair not of the Mercy of Allah. for Allah forgives all sins: for He is Oft-Forgiving, Most Merciful.)