Tafsiran Ulangan 2:5: Rashi, Ibn Ezra, Or HaChaim & Rashbam

עד מדרך כף רגל — This means, Even מדרך כף רגל, as much as to say: even only treading with the feet (a single step). The text means, I do not permit you to pass into their land without their permission. — A Midrashic explanation is: I shall not give you of their land until there come the day of the treading of the sole of foot upon the Mount of Olives (the Messianic period), as it is said, (Zechariah 14:4) "And his feet shall stand [in that day upon the Mount of Olives etc.]”.

do not provoke [Hebrew: titgaru] them as in “stirs up [Hebrew: yegareh] strife” [Proverbs 15: 18].

לא אתן…מדרך כף רגל, "I will not give you…as much as for the sole of your foot, etc." Moses meant that G'd would not allow the Israelites to traverse the land of Edom in order to impose their will upon them. However, if the people of Edom would volunteer for the Israelites to pass through their country on their way to the West Bank, G'd would not forbid them to do so. This was the reason for sending messengers to sound out the Edomites on the subject.

ירשה לעשו [I HAVE GIVEN MOUNT SEIR] TO ESAU AS AN INHERITANCE from Abraham. The territory of ten clans I gave (promised) him (Abraham); seven of them will be yours (the seven clans of Canaan), and the Kenites, the Kenizzites and the Kadmonites, — who are Ammon, Moab and Seir — one of them already belongs to Esau, and the other two to the children of Lot (cf. Genesis Rabbah 44:23; and Rashi on Genesis 15:19); as a reward because he (Lot) went with him (Abraham) To Egypt, and kept silent about what he said regarding his wife, “She is my sister”, he treated him as his son (and therefore he, through his children Amon and Moab, inherited part of the land promised to him) (cf. Rashi on Genesis 19:29 and Genesis Rabbah 51:6).