Meher Baba's message dictated to Sanjeeva Reddy at Guruprasad (June 6, 1960), as quoted in Charles Benjamin Purdom "The God Man: The Life, Journeys and Work of Meher Baba with an Interpretation of His Silence and Spiritual Teaching" (p. 353), December 25, 1964.
Max Muller (2013). “Sacred Books of the East: Including Selections from the Vedic Hymns, Zend-Avesta, Dhammapada, Upanishads, the Koran, and the Life of Buddha”, p.146, Lulu Press, Inc