Easton's Bible Dictionary: M. G. Easton, M.A., D.D.

Ephah

Gloom.

1. One of the five sons of Midian, and grandson of Abraham (Gen. 25:4). The city of Ephah, to which he gave his name, is mentioned Isa. 60:6, 7. This city, with its surrounding territory, formed part of Midian, on the east shore of the Dead Sea. It abounded in dromedaries and camels (Judg. 6:5).
2. 1 Chr. 2:46, a concubine of Caleb.
3. 1 Chr. 2:47, a descendant of Judah.

Ephah, a word of Egyptian origin, meaning measure; a grain measure containing "three seahs or ten omers," and equivalent to the bath for liquids (Ex. 16:36; 1 Sam. 17:17; Zech. 5:6). The double ephah in Pr. 20:10 (marg., "an ephah and an ephah"), Dt. 25:14, means two ephahs, the one false and the other just.