in the Ta'anit Bechorot
Fast of the Firstborn (Hebrew: תעניתבכורות, Ta'anit B'khorot or תעניתבכורים, Ta'anit B'khorim); is a unique fast day in Judaism which usually falls on the day before Passover (fourteenth day of Nisan). Feast of Unleaven Bread always begins on the fifteenth of the Hebrew month. Unlike most Jewish fast days, only firstborns are required to fast on the Fast of the Firstborn.Usually, the fast is broken at a siyum celebration (typically made at the conclusion of the morning services), which, according to prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast.
Fast of the Firstborn (Hebrew: תעניתבכורות, Ta'anit B'khorot or תעניתבכורים, Ta'anit B'khorim); is a unique fast day in Judaism which usually falls on the day before Passover (fourteenth day of Nisan). Feast of Unleaven Bread always begins on the fifteenth of the Hebrew month. Unlike most Jewish fast days, only firstborns are required to fast on the Fast of the Firstborn.Usually, the fast is broken at a siyum celebration (typically made at the conclusion of the morning services), which, according to prevailing custom, creates an atmosphere of rejoicing that overrides the requirement to continue the fast.