Abram believed the Lord, and he credited it to him as righteousness.

 Genesis 15:1-21

But Abram said, “Sovereign Lord, what can you give me since I remain childless and the one who will inherit my estate is Eliezer of Damascus?” And Abram said, “You have given me no children; so a servant in my household will be my heir.

Then the word of the Lord came to him: “This man will not be your heir, but a son who is your own flesh and blood will be your heir.” He took him outside and said, “Look up at the sky and count the stars—if indeed you can count them.” Then he said to him, “So shall your offspring be.”

Abram believed the Lord, and he credited it to him as righteousness.

He also said to him, “I am the Lord, who brought you out of Ur of the Chaldeans to give you this land to take possession of it.”

But Abram said, “Sovereign Lord, how can I know that I will gain possession of it?”

You, however, will go to your ancestors in peace and be buried at a good old age. In the fourth generation your descendants will come back here, for the sin of the Amorites has not yet reached its full measure.

Then the Lord said to him, “Know for certain that for four hundred years your descendants will be strangers in a country not their own and that they will be enslaved and mistreated there. But I will punish the nation they serve as slaves, and afterward they will come out with great possessions.

 When the sun had set and darkness had fallen, a smoking firepot with a blazing torch appeared and passed between the pieces. On that day the Lord made a covenant with Abram and said, “To your descendants I give this land, from the Wadi of Egypt to the great river, the Euphrates— the land of the Kenites, Kenizzites, Kadmonites, Hittites, Perizzites, Rephaites, Amorites, Canaanites, Girgashites and Jebusites.

Why?

The Lord let Abram know what would be for his descendants, including 400 years of slavery in Egypt, and the land would be the land of Abram's descendants.

God's word never fails, so love and righteousness never fail either. Just trust in the Lord and obey God's word, for we are children of the Lord.

What I have to do is come closer to the Lord, meditate God's mind and way and say what the Lord like me to share and honor the Holy Name of the Lord, no me.

How?

Forsake me, Lord. For I focused on my work, my job for a few years,  forgive me and let me turn back to the Lord and focus on the Lord, make me closer relationship with the Lord.