It's day one of the festival, and Rimuru finally gets to see all of his friends' performances and presentations. As he's enojying the festivities, he's summoned by Luminus...
so they say they will wait 
until the day after it ends.
لذا قالوا بأنّهم سينتظرون حتّى اليوم
الّذي يلي انتهاء المهرجان
meinten Sie, dass sie bis zum Tag
nach dem Ende des Fests warten.
esperarán hasta el día
después de que termine.
esperarán hasta el día
después de que termine.
ils nous laissent
jusqu’au lendemain de la clôture.
quindi sono disposti ad aspettare
il giorno successivo alla fine dell'evento.
então disseram que vão esperar até
o dia seguinte ao fim do festival.
Они готовы ждать
до предпоследнего дня фестиваля.