Exodus 34:7

7 and keeping justice and mercy for thousands, taking away iniquity, and unrighteousness, and sins; and he will not clear the guilty; bringing the iniquity of the fathers upon the children, and to the children's children, to the third and fourth generation.

Exodus 34:7 In-Context

5 And the Lord descended in a cloud, and stood near him there, and called by the name of the Lord.
6 And the Lord passed by before his face, and proclaimed, The Lord God, pitiful and merciful, longsuffering and very compassionate, and true,
7 and keeping justice and mercy for thousands, taking away iniquity, and unrighteousness, and sins; and he will not clear the guilty; bringing the iniquity of the fathers upon the children, and to the children's children, to the third and fourth generation.
8 And Moses hasted, and bowed to the earth and worshipped;
9 and said, If I have found grace before thee, let my Lord go with us; for the people is stiff-necked: and thou shalt take away our sins and our iniquities, and we will be thine.

The Brenton translation of the Septuagint is in the public domain.