'Sister' in the Bible

I, a ruler in the church, send word to the noble sister who is of God's selection, and to her children, for whom I have true love; and not only I, but all who have knowledge of what is true;

And now, my sister, I make a request to you, not sending you a new law, but the law which we had from the first, that we have love for one another.

The children of your noble sister, who is of God's selection, send you their love.