Isaiah 31:4

Like as the lion... — The similitude is note worthy, as for its fulness and vividness, so also for the fact that the lion is made the symbol, not of destruction, but protection. As the king of beasts stands haughtily defiant over the prey which he has made his own against the shepherds who seek to rob him of it, so will Jehovah, in His character as the Lord of hosts, refuse to surrender Jerusalem, His peculiar possession, to the armies of the Assyrians. (Comp. Homer, Il., 18:161.)

To fight for Mount Zion. — The preposition has been differently rendered as for, on, against. The lion in the last case is claiming the sheep as his own prey, and will not suffer interference from without. Jehovah, using the Assyrian armies as His instruments, will fight against Jerusalem, and will not allow the Egyptian allies to interfere with His chastisements. (Comp. Isaiah 29:7.) The second clause simply marks Jerusalem as the scene of the conflict, but agrees in substance with the first. Looking to the verse that follows, the idea of protection seems more natural than that of hostility. The thought of supreme ownership, however, includes both; Jerusalem belonged to Jehovah to protect or to chastise.