Is Ayin part of Eretz Yisrael or not?
Rashi: Since the Torah is defining the eastern border, "east of Ayin" indicates that Ayin is in Ereytz Yisrael. 1
Rashi: And the same applies to Yam Kineret where the Torah inserts the word "Keidmah",
What are the connotations of "Veyarad ha'Gevul"?
Rashi: Whenever the border runs from north ro south, the term "Vayarad" is applicable.