HaAderet v'HaEmunah (Hebrew: האדרת והאמונה, 'The Glory and the Faith'), commonly referred to as LeChai Olamim (Hebrew: לחי עולמים), is a piyyut, or Jewish liturgical poem, sung or recited during Shacharit of Yom Kippur in virtually all Ashkenazic communities, and on Shabbat mornings in Chassidic communities.