1 Chronicles 1:33
The sons of Midian: Ephah, and Epher, and Hanoch, and Abida, and Eldaah. All these were the sons of Keturah.
Isaiah 60:6
The multitude of camels shall cover you, the dromedaries of Midian and Ephah; all they from Sheba shall come; they shall bring gold and frankincense, and shall proclaim the praises of Yahweh.
Treasury of Scripture Knowledge
Summary
                            And the sons of Midian; Ephah, and Epher, and Henoch, and Abida, and Eldaah. All these are the sons of Keturah.                        
                    Ephah
General references
Bible References
Ephah
                                        Isaiah 60:6                                        
                                                            
                        The multitude of camels shall cover you, the dromedaries of Midian and Ephah; all they from Sheba shall come; they shall bring gold and frankincense, and shall proclaim the praises of Yahweh.
                                    General references
                                        Genesis 25:1                                        
                                                            
                        Abraham took another wife, and her name was Keturah.