Mang Wu asked about Tsze-lu, whether he was perfectly virtuous. The Master said, "I do not know."Go here to read the introductory post to this serialized version of the Analects of Confucius.
He asked again, when the Master replied, "In a kingdom of a thousand chariots, Yu might be employed to manage the military levies, but I do not know whether he be perfectly virtuous."
"And what do you say of Ch'iu?" The Master replied, "In a city of a thousand families, or a clan of a hundred chariots, Ch'iu might be employed as governor, but I do not know whether he is perfectly virtuous."
"What do you say of Ch'ih?" The Master replied, "With his sash girt and standing in a court, Ch'ih might be employed to converse with the visitors and guests, but I do not know whether he is perfectly virtuous."
~ James Legge translation via The Internet Classics Archive ~