Exodus 34:6-7
NIV 6 ^And he passed in front of Moses, proclaiming, “The Lord, the Lord, the compassionate and gracious God, slow to anger, abounding in love and faithfulness, 7 ^maintaining love to thousands, and forgiving wickedness, rebellion and sin...
Keeping mercy for thousands, forgiving iniquity and transgression and sin, and that will by no means clear the guilty ; visiting the iniquity of the fathers upon the children, and upon the children's children, unto the third and to the fourth generation.