Some of the earliest references to the state of contentment are found in the reference to the midah (personal attribute) of "Samayach B'Chelko"(In Hebrew שמח בחלקו). The expression comes from the word "samayach" (root Sin-Mem-Chet In Hebrew - ש.מ.ח) meaning "happiness, joy or contentment", and "chelko" (root Chet-Lamed-Kuf In Hebrew - ח.ל.ק) meaning "portion, lot, or piece", and combined mean contentment with one's lot in life. The attribute is referred to in the Mishnahic source which says, "Ben Zoma said: Who is rich? Those who are happy with their portion."