Stith Thompson, Motif-Index of Folk-Literature (1955)
“ Mere eating is usually of no particular interest in a story. Eating on a magic table, food furnished by helpful animals, food that gives magic strength — these become significant and are likely to be handed down by the teller of tales. Aside from the general principle just given, no rule has been followed in choosing what should go into the classification. I have tried to include all that becomes a part of tradition — all that is found worth retaining when tale, ballad, jest, or myth is transmitted by word of mouth or on the written page from generation to generation or from land to land. ”
