'Om Mani Padme Hum! Om Mani Padme Hum!' over and over again, hour after hour, day after day. The repetition of Om Mani Padme Hum! And the spinning of prayer-wheels and prayer-drums seemed to be the sum total of the layman's oblation.
Source of Descriptive Information
Forman, H. (1936).Through forbidden Tibet: An adventure into the unknown by Harrison Forman. London: Jarrolds. (p. 104).