“And it came to pass in those days, when there was no king in Israel, that there was a certain Levite sojourning on the side of mount Ephraim, who took to him a concubine out of Bethlehemjudah.”
King James Version (KJV)
19:1 A. concubine - Heb. a wife, a concubine, that is, such a concubine as was also his wife: called a concubine, only because she was not endowed. Perhaps he had nothing to endow her with, being himself only a sojourner.