[If] two groups were eating in one house: When some of them can see each other, they may combine for a collective blessing; but if not, these conduct a collective blessing by themselves, and these conduct a collective blessing by themselves. We do not recite a blessing over wine until water is added it; [these are] the words of R’ Eliezer. But the Sag-es say: We recite the blessing.

These are matters [of dispute] between Beis Shammai and Beis Hillel [with respect to] meals. Beis Shammai say: One recites the blessing over the [sanctity of] the day [first], and recites the blessing over the wine afterwards. But Beis Hillel say: One recites the blessing over the wine [first], and recites the blessing over [the sanctity of] the day after-wards.