Most of Guru Gobind Singh’s bani is found in the Dasam Granth. The Dasam Granth (Punjabi: ਦਸਮ ਗ੍ਰੰਥ), historically known as Dasven Padshah Ka Granth (Punjabi: ਦਸਵੇਂ ਪਾਤਸ਼ਾਹ ਕਾ ਗ੍ਰੰਥ) (Book of the Tenth Emperor), is the second most important scripture of Sikhism. It contains text composed by the 10th Sikh Guru, Guru Gobind Singh.

The compositions of the Granth set out the ideas, thoughts and guidelines for the future of the Nanak panth as enshrined in the Khalsa. The Jaap Sahib, Tvye Prasad Sawaiye (Amrit Savaiye) and Benti Chaupai, all compositions from the Dasam Granth, are part of the daily prayers Nitnem of the Sikhs, which serve, as well, as a part of the Sikh initiation Khande di Pahul ceremony.

http://www.sikhiwiki.org/index.php/Bani_of_Guru_Gobind_Singh