Kabbalah of Chagigah 3

Chagigah 3 mentions two mute brothers. They wanted to learn Torah and attended the teacher's lessons. In the end, the teacher saw their desire and prayed for them, and they started talking. 

These two brothers were the reincarnation of Eldad and Medad. Eldad and Medad are among the seventy-two sages who prophesied in the camp. They were also brothers, sons of Yocheved whom she bore while being divorced from Amram.

There were two reasons why they were born mute in this reincarnation. Amram did not give Yocheved a Get with a whole heart. The second was that their prophecy was about Moses' death and thus inappropriate without permission. Thus, in the new incarnations, they were born mute, and they first suffered and then corrected this defect through Torah study. This, then, was their Tikkun (correction.)

Art: Two Brothers by Maurice Leloir