An-Nisa' - 4:149

إِن تُبْدُواْ خَيْرًا أَوْ تُخْفُوهُ أَوْ تَعْفُواْ عَن سُوَءٍ فَإِنَّ اللّهَ كَانَ عَفُوًّا قَدِيرًا
[4:149]
If you do good openly or do it in secret or pardon an evil then surely Allah is Pardoning, Powerful.
Whether ye publish a good deed or conceal it or cover evil with pardon, verily Allah doth blot out (sins) and hath power (in the judgment of values).
If ye do good openly or keep it secret, or forgive evil, lo! Allah is ever Forgiving, Powerful.