'Undefiled' in the Bible

I was asleep, but my heart waked: It is the voice of my beloved that knocketh,'saying , Open to me, my sister, my love, my dove, my undefiled; For my head is filled with dew, My locks with the drops of the night.

My dove, my undefiled, is but one; She is the only one of her mother; She is the choice one of her that bare her. The daughters saw her, and called her blessed; Yea , the queens and the concubines, and they praised her.