ཤེས་རབ་སྙིང་པོ།  ། | The Heart Sūtra or Sherab Nyingpo The Heart Sūtra or Sherap Nyingpo  (ཤེས་རབ་སྙིང་པོ་) is one of the most popular Buddhist sūtra and  certainly among the most widely used and chanted sutra-s in Tibet. Its  full title in Sanskrit is Bhagavatīprajñāpāramitāhṛdaya and in Tibetan  བཅོམ་ལྡན་འདས་མ་ཤེས་རབ་ཀྱི་ཕ་རོལ་ཏུ་ཕྱིན་པའི་སྙིང་པོ་ which translates as  The Heart of the Blessed Perfection of Wisdom. The followers of  Mahāyāna Buddhism consider it as sacred literature that falls within the  category of the words of the Buddha. Thus, it is placed within the  Perfection of Wisdom (ཤེར་ཕྱིན་) section of the Kagyur (བཀའ་འགྱུར་)  canon. According to the sūtra itself, the Heart Sūtra was taught by the  Buddha while he was on Vulture Peak, Rajagṛha, with his monastic and  bodhisattva followers.

https://thongdrol.org/sherab-nyingpo/