Originally 54 chapters of The Tale of Genji was counted 37 chapters, compared to 37 Buddhist images, so there is a view that the chapters whose contents could be classified into the same group for some reasons came to be called 'narabi.'
もともとの源氏物語54帖を仏体37尊になぞらえて37帖と数えるために、何らかの理由で内容が一括できるようなものを「並び」と称するようになったとする説。