Isaiah Chapter 27.
The prophet opens up with a description of the future redemption of Israel coming back to its land and bringing a lot of benefit to all of mankind. So too, in the continuation of the prophet’s words, he mentions the sounding of the Great Shofar where literally lost Jews will be collected together and returned to the Land of Israel. These announcements that the Great Redemption will end a lot of suffering gives optimism and belief to the people to withstand the obvious difficulties of living in a land and a country that is not ours.
In our parsha, we can assume in chapter 1, as the galut, the children of Israel in slavery, that their level of hope was probably so low, no seeing any light at the end of the tunnel. Even G-d’s Name does not appear throughout the entire chapter until the episode of the Hebrew midwives. Only later does G-d appoint His savior, Moshe to be His representative to save the persecuted. Then, G-d announces that He will rescue the Jewish people from the land of Egypt and bring them to their promised land, the Land of Israel.