Numbers 14:18

Overview - Numbers 14
1	The people murmur at the news.
6	Joshua and Caleb labour to still them.
11	God threatens them.
13	Moses intercedes with God, and obtains pardon.
26	The murmurers are debarred from entering into the land.
36	The men who raised the evil report die by a plague.
40	The people that would invade the land against the will of God are smitten.

Numbers 14:18  (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.