Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

The reason why the tent is to be so large and strong is given in Isa 54:3 : "For thou wilt break forth on the right and on the left; and thy seed will take possession of nations, and they will people desolate cities." "On the right and on the left" is equivalent to "on the south and north" (Psa 89:13, the speaker being supposed to have his face turned towards the east: compare the Sanscrit apân, situated at the back, i.e., towards the west). We must supply both west and east, since the promises contained in such passages as Gen 15:18-21 remained unfulfilled even in the age of David and Solomon. Jerusalem will now spread out, and break through all her former bounds (pârats is used in the same sense in Gen 28:14); and her seed (i.e., the seed acquired by the Servant of Jehovah, the dead yet eternally living One, the σπέρμα, whose σπέρμα He Himself is) will take possession of nations (yârash, yârēsh, capessere, occupare; more especially κληρονομεῖν, syn. nâchal); and they (i.e., the children born to her) will people desolate cities (hōshı̄bh, the causative of yâshabh, to be inhabited, Isa 14:20). Thus will the promise be fulfilled, that "the meek shall inherit the earth," - a promise not confined to the Preacher on the mount, but found also in Psa 37:9-11, and uttered by our own prophet in Isa 60:21; Isa 65:9.