'Sister' in the Bible

You have stolen (my) heart, my sister bride! You have stolen [my] heart with one [glance] from your eyes, with one ornament from your necklaces.

How beautiful is your love, my sister bride! How better is your love than wine, and the fragrance of your oils than any spice!

A garden locked [is] my sister bride, a spring enclosed, a fountain sealed.

I have come to my garden, my sister bride, I have gathered my myrrh with my spice, I have eaten my honeycomb with my honey, I have drunk my wine with my milk! Eat, O friends! {Drink and become drunk [with] love}!

I [was] asleep but my heart was awake. A sound! My beloved knocking! "Open to me, my sister, my beloved, my dove, my perfect one! For my head is full of dew, {my hair drenched from the moist night air}."

{We have a little sister}, {and she does not yet have any breasts}. What should we do for our sister {on the day when she is betrothed}?