Midrash su Salmi 125:2

What does “…led the people around (vayasev)…” (Exodus 13:18) mean? That the Holy One surrounded them, just as it says “But I will be for it-says the Lord-a wall of fire around (saviv)…” (Zechariah 2:9) Like a shepherd who was shepherding his sheep and saw wolves descending upon them, he turned back the sheep in order that they not be hurt. So to, when Israel came out of Egypt the chiefs of Edom, Moav, Canaan and Amalek stood around and took counsel on how to come upon Israel. When the Holy One saw this He sent them around in order that they not come upon them, as it says “So God led the people around…” (Exodus 13:18) Not only was this so in this world, but it will be so in the next as well. From where do we do know this? As David said “Jerusalem has mountains around it, and the Lord is around His people…” (Psalms 125:2) Another explanation. “So God led the people around…” (Exodus 13:18) From here our Rabbis said that even the poorest in Israel should not eat until he reclines (yasev), because this is what the Holy One did for them ‘So God led the people around (vayasev).’

"and it shall consume the land and its produce": Eretz Yisrael. "and it shall set ablaze the foundations of the mountains": Jerusalem, as it is written (Psalms 125:2) "Jerusalem — mountains surround it, and the L-rd surrounds His people."