요엘 2:26의 Responsa

They responded: "And you shall eat your fill and bless the name of your God, who has dealt so wondrously with you." (Joel 2:26) - and the proof can be found in Yom Kippur and Tisha B'Av and other fast days. I believe the proof that they refer to is the Talmudic statement (Shabbat 24a:4): "On fast days, one recites the regular evening, morning and afternoon prayers, and includes a mention of the event of the day in the Shome'a Tefillah blessing." Now, it can't be that this additional paragraph for fast days would be recited in the evening prayer if one was going to then eat afterwards¹This applies to fast-days that strictly begin at sunrise. It would be permitted to eat at night, but the blessing wouldn't be relevant unless the meal was earlier and not intended for after the evening prayer. Rather, it must be that it applies to those who eat after the afternoon prayer, and only then recite the evening prayer with the additional relevant paragraph for fast days included within. Therefore, we see that it is permissible to eat between the two prayers.