"Six years shall he serve": I might think (that he performs) both demeaning and non-demeaning service. It is, therefore, written (Leviticus 25:39) "Do not have him work the service of a slave"—whence they ruled: He should not wash his feet or tie his sandals or carry his clothing to the bath-house or gird his loins for an ascent or carry him in a litter or in a chair or in a sedan-chair, as slaves do. Whence is this derived? From (Ibid. 46) "And in your brothers, the children of Israel, one may not lord it over another." But with his son and his disciple, it is permitted.