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'?

Is zimun (invitation formula before Birkat HaMazon) obligatory when three or more adults eat together?

2 opinions

Should the mezamen (leader) say 'Nevarekh' (let us bless) or may he say 'Barekhu' (bless!) when leading zimun?

3 opinions

Should the mezamen add 'u-v'tuvo chayinu' (and by His goodness we live) in his opening formula 'Nevarekh she-akhalnu mi-shelo'?

6 opinions

Should the assembled diners answer 'Amen' after the mezamen concludes his response ('Baruch she-akhalnu mi-shelo u-v'tuvo chayinu')?

4 opinions

Should 'Baruch Hu u-varuch Shemo' be said after the mezamen mentions God's name in the zimun formula?

5 opinions

When zimun is said with ten or more, must God's name ('Eloheinu') be mentioned in the zimun formula?

3 opinions

Is it permitted to say 'Nevarekh l'Eloheinu' (with a lamed prefix — 'to our God') in the zimun formula?

3 opinions

Is it permitted to deviate from the standard zimun nusach — e.g., saying 'al ha-mazon she-akhalnu,' 'le-mi she-akhalnu mi-shelo,' 'mi-tuvo' instead of 'u-v'tuvo,' or 'chayyim' instead of 'chayinu'?

6 opinions