Visuddhimagga XIV-221

Apica cārakakāraṇaaparādhakāraṇakārakaaparādhikupamā ete bhājanabhojanabyañjanaparivesakabhuñjakūpamā cāti evaṃ upamāto vinicchayanayo viññātabbo.

此等五蕴，又如：牢狱、惩罚、犯罪、惩罚者、服罪者；亦如食器、食物、菜、侍候者、食者。如是当知以譬喻而抉择。

Ñ(XIV,221): Also they are (respectively) like the prison, the punishment, the offence, the punisher, and the offender. And they are like the dish, the food, the curry sauce [poured over the food], the server, and the eater. This is how the exposition should be known as to simile.