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).

Source: Wikipedia — Eleven-Faced Avalokitesvara Heart Dharani Sutra (CC BY-SA 4.0)