'Sister in law' in the Bible

But if the man [does] not want to take his sister-in-law, then his sister-in-law shall go up to the gate, to the elders, and she shall say, 'My brother-in-law refused {to perpetuate his brother's name} in Israel, [for] he is not willing {to marry me}.'

[then] his sister-in-law shall go near him before the eyes of the elders, and she shall pull off his sandal from his foot, and she shall spit in his face, and she shall {declare} and she shall say, 'This is how it is done to the man who does not build the house of his brother.'

And she said, "Look, your sister-in-law has returned to her people and to her gods. Return after your sister-in-law [too]."