Perhaps the best-known sebayt is the one which claims to have been written by Ptahhotep, the vizier to the Fifth Dynasty pharaoh Djedkare Isesi, who ruled from 2388-2356 BCE. Ptahhotep's sebayt is often called The Maxims of Ptahhotep or the Maxims of Good Discourse (the latter being a phrase used as a self-description in the sebayt itself).[6] The teaching appears on the Twelfth Dynasty Prisse Papyrus along with the ending of the Instructions of Kagemni.[7] Another well known sebayt was attributed to the Fourth Dynasty ethicist named Hardjedef. Only a few fragments survive of his Instruction.[8]