פירוש על קידושין 138:1

Deuteronomy 17:8 uses the phrase “go up” to describe going to the Temple. This demonstrates that the Temple is the highest point in Eretz Yisrael.
Jeremiah uses the phrase brought up to describe people coming to Eretz Yisrael from other countries. From here we can see that Eretz Yisrael is higher than other countries.