This Bani is part of the Bachitar Natak which is the third main composition in the Dasam Granth, the second holy Scripture of the Sikhs. The first two compositions in the Dasam Granth are Jaap Sahib and Akal Ustat. This section called the "The Spiritual Kings" is the fifth section of Bachitar Natak and is found on pages 129 to 131 at Sri Granth.org.