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To Xeniades, who had purchased Diogenes at the slave market, he said, "Come, see that you obey orders."

"Lives and Opinions of Eminent Philosophers, Book 6: The Cynics". Book by Diogenes Laërtius translated by R. D. Hicks, 1925.
To Xeniades, who had purchased Diogenes at the slave market, he said, Come, see that you obey orders.