The father blessed his children

Abraham had many children. He was a good father. He provided for his family. God blessed him with riches and he blessed his family.
Abraham will die and give his money and properties to Issac. But he had other sons.
So he gave his others sons some gifts.
Issac was in the genealogy of the Messiah so he got Abraham's money.
The other sons got earthly goods but wasn't in the genealogy of the Messiah.
God can bless us on this earth but many people will not repent. So these people will not have heaven.
Issac was in the genealogy of the Messiah so he had heavenly rewards.
If we repent and follow Jesus then we will receive heavenly rewards and heaven. 

Genesis 25:5-6

 ⁵ Abraham left everything he owned to Isaac. ⁶ But while he was still living, he gave gifts to the sons of his concubines and sent them away from his son Isaac to the land of the east.