DESCRIPTION:
Fukanzazengi, Universally Recommended Instructions for Zazen, by Eihei Dōgen (1200-1253). The translation is by Taigen Dan Leighton and Shohaku Okumura. It is read aloud for the benefit of those who have difficulty with reading for any reason. The text itself is available here: http://antaiji.org/en/classics/fukanzazengi/

You can also find it in the print volume of Eihei Kōroku (Dōgen’s Extensive Record): https://www.goodreads.com/book/show/672523.Dogen_s_Extensive_Record

Mike Chodo Cross gives a commentary on the text here: http://www.zen-occidental.net/enseignements/cross1.html

Jundo Cohen's book The Zen Master's Dance also has an excellent chapter on Fukanzazengi: https://wisdomexperience.org/product/the-zen-masters-dance/