Chapter 51 -
"Chapter 51" appears in many famous books and religious texts. Since I'm not sure which one you're looking for, here are the full texts (or links to them) for the most common requests:
: A message of comfort to Zion, urging the people to "look to the rock from which you were hewn." Chapter 51
: A Chabad Hasidic text explaining how the Divine Presence (Shechinah) dwells within the physical world and the human soul. "Chapter 51" appears in many famous books and
: Describes Jacob sending his sons to Egypt to buy grain during the great famine. Other Notable Mentions Chapter 51