Gen 15:7-21. Sometimes faith has to take a long view of things. The conversation between the Lord and Abraham is interesting to trace.
Yahweh: I brought you to this land to give it to you. (7)
Abraham: How do I know this land will be my land? (8)
Yahweh: Your descendants will not live in this land for 400 years. They will be in another land for that time, and they will suffer greatly there. But then I will judge that land and bring your descendants out along with great wealth. (13-14)
You, however, won’t suffer. You’ll die in peace. (15)
Your descendants will come here in the fourth generation, because not until then will I be ready to judge the Amorites in this land. (16)
(Making it official) I give this land to your offspring, this land currently belonging to other peoples. (18-19)
This land will be your land in about four centuries. Well did the writer of Hebrews write: “All these people were still living by faith when they died. They did not received the things promised; they only saw them and welcomed them from a distance. And they admitted that they were aliens and strangers on earth…. These were all commended for their faith, yet none of them received what had been promises.” (Heb 11:13,39)