What minimum food intake is required for a third person to join two bread-eaters for a zimun of three?
Synopsis
For a zimun of three, the Mechaber cites three opinions on what minimum the third person must eat: (1) a kazayit of bread specifically; (2) a kazayit of any grain product; (3) any food or drink at all. The Mechaber rules l'chatchilah to require bread, but b'dieved accepts any food.
More in After-Blessings on Mezonot
Can a third person join two who have finished eating for a zimun, and what is the condition for joining?
4 opinions across 3 eras
Does washing mayim acharonim (final waters) constitute a signal of meal-end equivalent to saying 'Hav lan venevarekh,' preventing a latecomer from joining the zimun?
3 opinions
Can one person who ate vegetables (not bread) join nine who ate grain to constitute a group of ten for zimun with God's name (Eloheinu)?
4 opinions
Must the person who joined for zimun recite his own after-blessing, or is he discharged by the Birkat HaMazon of the bread-eaters?
3 opinions
When some diners ate a full satiation (sevi'ah) and others ate only a kazayit, who should lead the Birkat HaMazon?
4 opinions
Is one who ate but did not drink obligated in Birkat HaMazon at the Torah level when he is thirsty?
5 opinions
Related from other topics
Does the prohibition on altering biblical verses extend to changes other than singular/plural, such as shifting from third-person to second-person address?
Insertions in Birkat HaMazon
What is the minimum quorum required for Birkat Kohanim (the Priestly Blessing)?
Birkat Kohanim — Detailed Laws
What is the minimum number of adults required for public Torah reading?
Musaf Prayer
What is the minimum amount of water (shiur) required for hand washing?
Washing Hands for Bread
What is the minimum size of a garment required to be obligated in tzitzit?
Garment Size Requiring Tzitzit
If ten diners were required to say 'Eloheinu' in zimun but the mezamen forgot and said the zimun without mentioning God's name, and the assembled already responded without the Name — can they redo the zimun with 'Eloheinu'?
Zimmun and Joining Groups
Discussion
Discussion coming soon.
The Daily Law
One question. Every opinion. Every morning.
A new halakhic question and the full spectrum of rabbinic thought, delivered daily.