e'-duth (`edhuth, "testimony," a technical term for the Ten Commandments or for the Law):
In Ps 60 title, "set to Shushan Eduth" (literally, "a lily (is) the testimony"); 80 title, "set to Shoshannim Eduth" (literally, "lilies (is) the testimony"). The Hebrew words appear to be intended to designate a melody by the first few words ordinarily associated with it.
See PSALMS.