en_tn/jhn/02/06.md

two to three metretes

"80 to 120 liters." A "metrete" was a measure of about 40 liters of liquid. (See: rc://en/tw/dict/bible/other/biblicalvolume)

to the brim

This means "to the very top" or "completely full."

the head waiter

This refers to the person in charge of the food and drink.