The visitor distinguishes two situations: a feast that burdens hosts and real hunger that prevents a traveller from sleeping. Treating them as identical misses the precision of his speech.
SituationArabic phraseFunctionUnneeded preparationتُجَشِّمُوا لِأَجْلِي أَكْلًاExtra work for the hostsGenuine hungerنَارُ الْجُوعِA real need for foodLoss of sleepتَحُولَ دُونَ الْهُجُوعِThe need becomes pressing
The comparison clarifies the visitor’s balanced argument rather than making his refusal absolute.