'Undefiled' in the Bible

I slept, but my heart was awake. The voice of my beloved! he knocketh: Open to me, my sister, my love, my dove, mine undefiled; For my head is filled with dew, My locks with the drops of the night.

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