Yet he gave him no inheritance in it, not even a foot's length, but promised to give it to him as a possession and to his offspring after him, though he had no child. And God spoke to this effect—that his offspring would be sojourners in a land belonging to others, who would enslave them and afflict them four hundred years.
Acts 7:5-6

Abraham was a sojourner in his own land. He never took possession of any ground in the Promised Land except one place to bury his dead. God told Abraham that his descendants would be sojourners and slaves for 400 years. They sojourned in Canaan, Syria, Midian, and Egypt, and foreigners took all they produced. They were sojourners the entire time and slaves for about half.