Numbers 14:31

But your little ones, which ye said should be a prey, them will I bring in, and they shall know the land which ye have despised.

They (i:e., your little ones) shall know the land which ye have despised. This refers to the refusal of the people, misguided by the false report of the ten spies, to invade the land of Canaan. They preferred the testimony of these hasty explorers to that of God Himself (cf. Ps. 77:22,32).