Eleven-Faced Avalokitesvara Heart Dharani Sutra
The Dhāraṇī of Avalokiteśvara Ekadaśamukha Sūtra (Eleven-Faced Avalokiteśvara Heart Dharani Sutra, Chinese: 佛說十一面觀世音神咒經 / 圣十一面观自在菩萨根本咒) is a Dhāraṇī sutra (a sutra focused on specific magical chants, incantations, recitations called dhāraṇī) first translated from Sanskrit into Chinese on the 28th day of the third lunar month of 656 CE, by Xuanzang.
This sutra contains the dhāraṇī Heart-dhāraṇī of Avalokiteśvara-ekadaśamukha (Chinese:聖十一面觀自在菩薩根本咒). "Eleven faced Avalokiteśvara" is a form of Avalokiteśvara bodhisattva with eleven heads. In the text, the Buddha introduces, discussed how to practice the dhāraṇī and talks about the benefits and the incredible power of this dhāraṇī.
This is a popular chant throughout East Asia. There is a sung version of the dhāraṇī that is very popular among Asian Buddhists and is performed by famous religious or lay artists, which again is also mislabeled as the Great Compassion Mantra in Sanskrit.