במדבר לד:יא פירוש: רש״י, רבנו בחיי וחזקוני

מקדם לעין ON THE EAST SIDE OF AIN — עין is the name of a place. The boundary went to the east of it, and consequently Ain is within the boundary and was part of the land of Israel.

ומחה על כתף ים כנרת, the word is similar to ימחאו כף, “clapping with one’s hands,” (Psalms 98,8) [i.e. an expression of closeness of two objects, touching].

וירד הגבול AND THE BOUNDARY SHALL GO DOWN — The more the boundary goes from north to south it goes down more and more.