Audio reading of Hsin Hsing Ming (Verses on the Faith Mind) attributed to the Third Patriarch, Seng-Ts'an (https://en.wikipedia.org/wiki/Sengcan)
I use this translation by Richard B Clarke from the original Chinese: http://www.age-of-the-sage.org/buddhism/third_patriarch_zen.html. Other translations are also available.
Extensive information on the text can be found here: http://www.sacred-texts.com/bud/zen/fm/fm.htm