Abraham believed that all nations would be blessed through Christ, who would come as his descendant. (Genesis 15:5-6, Romans 4:18-25)
Genesis 15:5 And he brought him forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed be. 6 And he believed in the Lord; and he counted it to him for righteousness.
Romans 4:18 Who against hope believed in hope, that he might become the father of many nations, according to that which was spoken, So shall thy seed be. 19 And being not weak in faith, he considered not his own body now dead, when he was about an hundred years old, neither yet the deadness of Sarah's womb: 20 He staggered not at the promise of God through unbelief; but was strong in faith, giving glory to God; 21 And being fully persuaded that, what he had promised, he was able also to perform. 22 And therefore it was imputed to him for righteousness. 23 Now it was not written for his sake alone, that it was imputed to him; 24 But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead; 25 Who was delivered for our offences, and was raised again for our justification.
When Abraham gave birth to his son Isaac, he rejoiced thinking about Christ, who would come as the descendant of Isaac. (John 8:56)
John 8:56 Your father Abraham rejoiced to see my day: and he saw it, and was glad.
When Abraham arrived in Canaan, the land where Christ would come, he did not build a house, but built a tent and waited for Christ to come. (Heb 11:8-10)
Heb 11:8 By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went. 9 By faith he sojourned in the land of promise, as in a strange country, dwelling in tabernacles with Isaac and Jacob, the heirs with him of the same promise: 10 For he looked for a city which hath foundations, whose builder and maker is God.