Hacham Mori Yaish Koriani, son of Hacham Moussa, was born in Yemen. One of the sages of the Hujrah province of Yemen, he was appointed Head of the Rabbinic Court and Chief Rabbi of the city of Moitzira. Hacham David Haddad and Hacham Yosef Hassan officiated alongside him in the rabbinic court.
Hacham Mori Yaish Koriani, proficient in both the hidden and revealed facets of Torah, led a saintly and ascetic life, and reached great spiritual heights. A large number of students, including Hacham Mori Shlomo Tebib and Hacham Mori Haim Sinaoui, succeeded him.
Hacham Yaish Koriani passed away on 20 Adar, 5677 (1917). He authored many works, some of which have been lost over time: Tipei Shemen, Peirot HaIlan, Neve Hochma and others. His principal work, Makhmadei Shama’im, on the Torah, survived and was published in 2007.