Numbers 14:18-19

18Jehovah is slow to anger, and abundant in goodness, forgiving iniquity and transgression, but by no means clearing [the guilty], visiting the iniquity of the fathers upon the children, upon the third and fourth [generation].

19Pardon, I beseech thee, the iniquity of this people according to the greatness of thy loving-kindness, and as thou hast forgiven this people, from Egypt even until now.