An ephah is a Biblical unit of measurement equal to 1/2 bushel or 17.6 liters.

The ephah is equivalent to 1/10 of a cor or homer.

Ephah is used dozens of times throughout the Bible in relation to all kinds of agriculture.  In addition to being a unit of measurement, it is used to refer to a basket the size of an ephah, much like today we have a bushel basket.