שולחן ערוך אורח חיים · סימן פ׳

English

One Who is Not Able to Guard [Themselves] from Flatulence. Containing 1 S'if: One whose health is such that they are not able restrain themselves from flatulence until they complete the Sh'ma and prayer [i.e. the Amidah] - it is better that they should let the time of the Recitation of the Sh'ma and prayer pass and not pray [during that time] than to pray without a clean body. And if the time of prayer passed, they are considered to have had an extenuating circumstance, and they should pray [the] mincha [Amidah] twice. And if it seems to him that he is able to restrain himself at the time of the Recitation of the Sh'ma, he should don his tefillin between Ahavah [Rabbah/Olam] and the Recitation of the Sh'ma. Rem"a: and one blesses over them [Tur]