What is the meaning of "Lachen Yitenem Ad Es Yoledah"?
Rashi: They will be given in the hand of their enemies until the time that Tziyon will give birth to her children. Now she is seized with "Chil ka'Yoledah" (Yirmeyah 6:24), and she is called Yoledes.
Rashi citing Yuma 6a: Ben David will not come until the evil kingdom will spread over the entire world for nine months.
Radak: At the time of the salvation, Hashem will put Yisrael in affliction, and bring them to the time of birth. I.e. they will have great afflictions like birth contractions, like it says "v'Haysah Es Tzarah Asher Lo Nihyasah mi'Hyos Goy Ad ha'Es ha'Hi" (Daniel 12:1).
Radak citing Targum Yonasan: They will be handed over at the time of birth. Their other brothers will rely on them.
Malbim: The entire time until the gathering of exiles is finished, which is depicted as a woman giving birth ? "Ki Chalah Gam Yaldah Tziyon Es Baneha" (Yeshayah 66:8), and until Yehudah's other brothers return to their land, chiefs of Yehudah will be under Beis Yisrael (the 10 tribes). They will be primary, and Mashi'ach ben Yosef heads them. They will fight and rule, and Beis Yehudah will be secondary to them ? "Hine Ani Loke'ach Es Etz Yosef? v'Nasati Osam Alav Es Etz Yehudah" (Yechezkel 37:19).
Who are his other brothers?
Rashi: The brothers of Melech Yehudah, i.e. the rest of Shevet Yehudah.
Radak: They are Shevet Yehudah and Binyamin, who remained when the 10 tribes were exiled. They are called the brothers of Mashi'ach.
What do we learn from "Yeshuvun Al Beis Yisrael"?
Rashi: They will join with the other Shevatim, and be one kingdom. They will not be divided again into two kingdoms. Radak ? "Al" is like 'Im'. Also the 10 tribes will return to their land.
