Why did Chazal mandate a meal with kiddush? What is it about the meal that determines if one has fulfilled kiddush for if one does not have a meal kiddush is not fulfilled. Why is the meal necessary to fulfill kiddush?
Please send sources.
The source for requiring a meal together with Kiddush is the pasuk “You shall call the Shabbos an oneg (pleasure),” which the Sages understand to mean that the time of “calling” (making Kiddush) must be a time of oneg (pleasure) in eating a meal (see Pesachim 101a, and Tosafos; Rif Pesachim 20a).
Without a mean the “calling” (Kiddush) lacks the element of pleasure mentioned in the verse, and it is therefore considered incomplete, so that one does not fulfill the mitzvah of Kiddush.