Like the author of the 18th Psalm, Abram learned that he could trust God in every situation. The longer he walked with God the stronger his faith became.
The fact that Abram’s descendants would live outside the land for 400 years is immaterial. God defines the land as an eternal possession.
“Do not be afraid, Abram. I AM your shield, your exceedingly great reward.” And he [Abram] believed in the LORD, and He accounted it to him for righteousness.
After rescuing Lot and his family, Abram made the 200-mile journey home. As he traveled, the kings of Salem and Sodom met him in the Valley of Shaveh where the city of Jerusalem. His response to each king is indicative of his integrity as a man of faith.
When Lot and his family were taken captive, Abram quickly assembled a veritable fighting force from the servants born in his household numbering 318 men strong. Not willing to use his 80 plus years as an excuse to sit on the sidelines, he took charge of the operation and followed the offending armies in hot pursuit.