Bekhorot 22 – בכורות כ״ב | Daf Yomi with Rashi, Tosafot, the Rambam and halacha

What Bekhorot 22 teaches

A miscarried mass exempts future births from bechor status, yet conveys no impurity because the fetus is nullified by congealed tissue.
A deceased human fetus conveys impurity at warp-skein size, an animal fetus at woof-skein size, and foreign earth at sack-seal size.
Purifying an am ha'aretz's fish brine in a mikveh works for dipping, but cooking might reawaken nullified impure water.

The sugyot

A miscarried mass requires burial to publicize bekhorah exemption, while its lack of corpse impurity is resolved through nullification in the majority.
The Gemara defines skein sizes for fetal head formation regarding womb opening impurity, contrasting human and animal measures, and clods of foreign earth.
The Gemara examines whether fish brine purchased from an am ha'aretz can be purified, and debates whether nullified impurity can later reawaken.

Halachot from the daf

Burial of a discharged blood mass to publicize firstborn exemption
Corpse impurity conveyed by an expelled human placenta in a house
Minimum fetal head size for opening of the womb to defile
Minimum measure of earth from the Diaspora or beit haperas
Purifying fish brine bought from an am ha'aretz via ritual contact
Nullification of impure terumah that fell into pure non-sacred produce

Gems from the Daf

Learn Bekhorot 22 sugya by sugya on Super Daf: the Gemara in Hebrew and English with Rashi, Tosafot, the Rishonim, the Rambam and the Shulchan Arukh woven in. Free.