 they claimed that the origin of this is taken from the word kharsa which means food for a woman in childbirth. a slave girl who gave birth when she had no one to serve her or do for her what a woman in childbirth does said
وزعموا أن أصل ذلك مأخوذ من الخرسة، والخرسة طعام النفساء. قالت جارية ولدت حين لم يكن لها من يخدمها ويمارس لها ما يمارس للنفساء