In addition to Tibetans and related peoples, Tibetan Buddhism is a traditional religion of the Mongols and their relatives. The Mongolian word for a "tülku" is "qubilγan", though such persons may also be called by the honorific title "qutuγtu" (Tib: '"phags-pa" and Skt: "ārya "or "superior", not to be confused with the historic figure, 'Phags-pa Lama or the script attributed to him, ("Phags-pa" script), or "hutagt" in the standard Khalkha dialect. According to the "Light of Fearless Indestructible Wisdom" by Khenpo Tsewang Dongyal: the term "tülku" "designates one who is 'noble' (or 'selfless' according to Buddha's usage) and used in Buddhist texts to denote a highly achieved being who has attained the first bhumi, a level of attainment which is truly egoless, or higher."