Halakhah do Kapłańska 25:41

The laws of the commandment: That which they, may their memory be blessed, were exacting about in the first chapter of Kiddushin 22b from that which the verse stated (Deuteronomy 15:16), "for it is good for him with you" - "'With you' regarding food, 'with you' regarding drink; that you should not eat refined bread and he eat coarse bread, nor should you drink aged wine and he drink unaged wine, nor should you sleep on pillows and he sleep on straw." They, may their memory be blessed, likewise said (Sifra, Behar, Chapter 7:3) that the master should not live in the town and the slave in the village, as it is stated (Leviticus 25:41), "And he shall leave from with you." And the rest of its details are in the Sifra and in Kiddushin (See Tur, Yoreh Deah 267).