Mordechai Ben David's classic song "Some Day" gives a description of what will happen in Yemot HaMashiach (the days of Mashiach). It seems to be a very popular song, and has doubtlessly influenced many people's perceptions of Mashiach.
But are there sources in classic Jewish texts that this is based on?
I'm specifically wondering about the chorus (quoted from Jewish Music Lyrics):
Someday we will all be together
Someday we'll be sheltered and warm
Never will we have to express any fear
Our scars and our wounds will disappear
Avraham and Yitzchok will be there to greet us
Yaakov and his sons will stand by and smile
Moshe Rabbeinu will lead us once again
in Yerushalayim - B'Ezras Hashem