Numbers 14:24 and Numbers 14:30 confirm that the Lord promised to keep Caleb alive so that he (and Joshua) would enter into the Promised Land. Of all who were twenty years of age and older when Israel left Egypt, only Caleb and Joshua lived to enter the Promised Land.
10 And now, behold, the LORD has kept me alive, just as he said, these forty-five years since the time that the LORD spoke this word to Moses, while Israel walked in the wilderness. And now, behold, I am this day eighty-five years old.