hiss for them - Keepers of bees by a whistle call them together. So Jehovah by the mere word of His call shall gather back to Palestine His scattered people (Zec 10:10; Isa 5:26; Eze 36:11). The multitudes mentioned by Josephus [Wars of the Jews, 3:2], as peopling Galilee two hundred years after this time, were a pledge of the future more perfect fulfillment of the prophecy.
for I have redeemed them - namely, in My covenant purpose “redeemed” both temporally and spiritually.