Instruction of Hardjedef

"The Instruction of Hardjedef, also known as the Teaching of Hordedef and Teaching of Djedefhor, belongs to the didactic literature of the Egyptian Old Kingdom. It is possibly the oldest of all known Instructions, composed during the 5th Dynasty according to Miriam Lichtheim, predating The Instructions of Kagemni and The Maxims of Ptahhotep. Only a few fragments from the beginning of the text have survived on a handful of New Kingdom ostraca and a Late Period wooden tablet."
-- Wikipedia