민수기 34:7 해설: Rashi, Rashbam, Siftei Chakhamim & Rav Hirsch

גבול צפון means THE NORTHERN BOUNDARY.

תתאו, drawing a boundary (presumably where there are no recognisable landmarks. Ed.]

And some outward. Meaning that on the western side [the sea] circles the mountain on the inner side, i.e., the side of the land of Israel, and on the outer side, meaning outside the land.

מן הים הגדול תתאו לכם הר ההר FROM THE GREAT SEA YE SHALL MARK OUT YOUR LINE UNTO MOUNT HOR, which is at the north-west corner, and its top slopes down and goes to the sea and there is some of the breadth of the sea inward of it and outside it.

תתאו means, YE MUST MOVE IN A SLANTING DIRECTION so as to move from west to north to Mount Horayot

תתאו is an expression denoting “a slanting turn”, just as in (1 Kings 14:28) “the slanting chamber (תא) of the runners" and (Ezekiel 40:10) “and the slanting chambers (תאי) of the gate”. The תא is a chamber with a sloping roof, which is called in O. F. apendiz; it is called תא because it leans and slopes (a lean-to or panthouse).