《资治通鉴·晋纪·晋纪九》
尚书左丞刘坦给朝廷上言： 古代养老，以不使任职为好，并不把任职视为看重他，所以说应当尊重刘自己的安排。 
尚书左丞刘坦上言： 古之养老，以不事为忧，不以吏之为重，谓宜听实所守。 
Liu Tan, the Left Chancellor of the Ministry of War, gave a memorial to the court: In ancient times, people respected retirement and not being appointed to office. They did not see that as a slight, so they said that Liu's wishes should be respected.