Exodus 34:7
6 The Lord passed by before him and proclaimed: “The Lord, the Lord, the compassionate and gracious God, slow to anger, and abounding in loyal love and faithfulness, 7 keeping loyal love for thousands, forgiving iniquity and transgression and sin. But he by no means leaves the guilty unpunished, responding to the transgression of fathers by dealing with children and children’s children, to the third and fourth generation.” 8 Moses quickly bowed to the ground and worshiped
Onkelos Exodus 34:7
6 The Lord made His Shekinah pass in front of Moses and proclaimed, 'The Lord, the Lord God, merciful and gracious, slow to anger, and abounding in steadfast love and truth,' 7 'extending goodness to thousands of generations, forgiving to those who commit iniquities, to those who commit transgressions, and to those who commit sins. He forgives those who return to His Torah; but those who do not return, He does not acquit. He visits the sins of the fathers upon children and children's children who are rebellious, on the third generation and on the fourth generation'. 8 Moses quickly bowed his head toward the earth and worshiped.
Notes and References
"... This chapter contains the 'thirteen attributes of God.' The nature of God's attributes is a subject treated in almost every medieval Jewish philosophical work. How can we ascribe any attributes to God that are not, in some way, anthropomorphic? And, conversely, how can we feel close to God if He possesses no attributes with which we can identify? Two of God's attributes appear to contradict each other in an awkward biblical phrase (Exodus 34:7): 'He [God] will acquit ... He will not acquit.' Onkelos reflects the rabbinic interpretation: 'He forgives those who return to His Torah; but those who do not return He does not acquit.' The midrashic Targum Pseudo-Jonathan states that the punishment will be inflicted 'in the day of the great judgment'; but this theological teaching is not included in our Targum ..."
Drazin, Israel, and Stanley M. Wagner Onkelos on the Torah, Exodus: Understanding the Bible Text (p. 244) Gefen, 2006