《后汉书·列传·杨李翟应霍爰徐列传》
故王者赏人必酬其功，以爵与人必明其德，与善人在一起，就每天听到一些好话；与恶人交游，就每天生出邪情。
故王者赏人必酬其功，爵人必甄其德。善人同处，则日闻嘉训；恶人从游，则日生邪情。
Therefore, the king rewards people according to their merits, and gives them titles according to their virtues. If you are with good people, you will hear good words every day; if you associate with bad people, you will have evil thoughts every day.