Omar la-Adonay maḥsi

Omar la-Adonay maḥsi, written by a poet named Mas’ud (this may be R. Mas’ud ben Mordechai Asab‘uni of Marrakesh, late 19th-early 20th c.) is is a stirring and energetic piyyut, mostly sung as part of the bakkashot and at the brit milah (circumcision ceremony), with the figure of Elijah the Prophet appearing in the refrain.