Raba says: We are always dealing with the case in which the first master has already renounced his right of possession. And if the slave has been ransomed in order to be a slave, he serves his second master [farther on the question will be asked, from whom the second master bought him]; if ransomed to be free, he serves neither his first nor his second master; not his second master, since he bought the slave to give him his liberty; and not the first, since he had already renounced the slave. R. Simon b. Gamaliel, on the other hand, says: In the one case as in the other he remains a slave [of his first master], according to the principle of Hezekiah, who said: Why is it admitted that he remains a slave in either case? So that it should not be possible for any slave whatsoever to deliver himself up to the enemy and thus render himself independent of his master. It is objected: R. Simon b. Gamaliel [we have been taught] said to his colleagues: "Just as it is a duty to ransom free men, so it is a duty to ransom slaves." This Baraita is to be understood according to Abaye, who takes it that there had been no renunciation [who applies the Mishnah to the case in which there has been previous renunciation; then the first paragraph of the Mishnah is motived by the abstention of the owner, who did not ransom his slave]: we thus explain to ourselves the expression "just as" [of R. Simon b. Gamaliel, for he does not suppose that the owner abstained, granted that it is a duty to ransom the slave]. But, according to Raba, who takes it that there has been renunciation [who applies the Mishnah to the case in which there was renunciation, and the first paragraph of the Mishnah is motived by the abstention of the owner, which is equivalent to a renunciation], this "just as" [of R. Simon b. Gamaliel, what does it signify?], since R. Simon b. Gamaliel bases his opinion upon the principle of Hezekiah [since the reason of R. Simon b. Gamaliel is the principle of Hezekiah: "so that the slave should not go and deliver himself up to the enemy"]. Raba replies, etc., (Gittin 37b).