Ephah was one of Midian

Midian

Midian , Madyan , or Madiam is a geographical place and a people mentioned in the Bible and in the Qur'an. It is believed to be in northwest Saudi Arabia on the east shore of the Gulf of Aqaba and the northern Red Sea...

's five sons as listed in the Hebrew Bible

Hebrew Bible

The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

. The son of Abraham

Abraham

Abraham , whose birth name was Abram, is the eponym of the Abrahamic religions, among which are Judaism, Christianity and Islam...

, Midian's five sons were Ephah, Epher

Epher

Epher was a grandson of Abraham, according to Gen. 25:4, whose descendants, Jewish historian Flavius Josephus claimed, had invaded Libya. Josephus also claimed that Epher's name was the etymological root of the continent Africa. According to the Bible, he was a son of Midian....

, Enoch, Abida

Abida Midian

Abid According to Genesis 25:4, Abida was the son of Midian, and the grandson of Abraham and his wife Keturah.Abraham sent his sons by Keturah to live in the east, far from their half-brother Isaac...

, and Eldaah. These five were the progenitors of the Midianites.

Geography

The Book of Isaiah

Book of Isaiah

The Book of Isaiah is the first of the Latter Prophets in the Hebrew Bible, preceding the books of Ezekiel, Jeremiah and the Book of the Twelve...

, chapter 60, mentions a land of Ephah from whence camel

Camel

A camel is an even-toed ungulate within the genus Camelus, bearing distinctive fatty deposits known as humps on its back. There are two species of camels: the dromedary or Arabian camel has a single hump, and the bactrian has two humps. Dromedaries are native to the dry desert areas of West Asia,...

s and dromedaries

Dromedary

The dromedary or Arabian camel is a large, even-toed ungulate with one hump on its back. Its native range is unclear, but it was probably the Arabian Peninsula. The domesticated form occurs widely in North Africa and the Middle East...

 would come to Israel: "A multitude of camels shall cover you, the young camels of Midian and Ephah".

Measurement

The Hebrew word "ephah" (איפה) means a particular measure

Biblical and Talmudic units of measurement

Biblical and Talmudic units of measurement, such as the Omer, used primarily by ancient Israelites, appear frequently within the Hebrew Bible as well as in later Judaic scripture, such as the Mishnah and Talmud...

 for grain, and "measure

Measurement

Measurement is the process or the result of determining the ratio of a physical quantity, such as a length, time, temperature etc., to a unit of measurement, such as the metre, second or degree Celsius...

" in general.

The measurement for an ephah is about 36.4 litres, or ten omers, or about one bushel

Bushel

A bushel is an imperial and U.S. customary unit of dry volume, equivalent in each of these systems to 4 pecks or 8 gallons. It is used for volumes of dry commodities , most often in agriculture...

.