Allah says:

اِسْتَغْفِرُوا رَبَّكُمْ إِنَّهُ كَانَ غَفَّارًا

Istaghfiroo Rabbakum innahoo kaana Ghaffaaraa.

Ask forgiveness from your Lord; for He is Oft-Forgiving;

Reference: Surah Nooh 71:10