Numbers 14:18 in the King James Version
The LORD is longsuffering, and of great mercy, forgiving iniquity and transgression, and by no means clearing the guilty, visiting the iniquity of the fathers upon the children unto the third and fourth generation.
Context
17 Now please let the power of the Lord be great, according as you have spoken, saying,
18 ‘The LORD is slow to anger, and abundant in loving kindness, forgiving iniquity and disobedience; and he will by no means clear the guilty, visiting the iniquity of the fathers on the children, on the third and on the fourth generation.’
19 Please pardon the iniquity of this people according to the greatness of your loving kindness, and just as you have forgiven this people, from Egypt even until now.”