An inheritor of my mountains "An inheritor of my mountain" - הרי hari, in the singular number; so the Septuagint and Syriac; that is, of Mount Sion. See Isaiah 65:11; and Isaiah 56:7, to which Sion, the pronoun feminine singular, added to the verb in the next line, refers; ירשוה yereshuah, "shall inherit her." - L.
And I will bring forth a seed - I will give descendants to Jacob, who shall share my favor and repossess the land.
An inheritor of my mountains - The mountains of Palestine - Jerusalem and the vicinity - called the mountains of God because he claimed that land as his special residence, and the place where his holy religion was established.
And mine elect - They who have been chosen by me to maintain my religion in the world.