There were two dumb men in the neighborhood of Rabbi, who were sons of the daughter of R. Jochanan b. Gudgada, and others say, sons of his sister, who, when Rabbis entered the house of learning, went in also, shook their heads, and muttered with their lips. Rabbi prayed for them and they were healed; and it was found that they were well versed on Halacha, and on the entire six sections of the Mishnah (the earliest code of rabbinic law)...