Sortes Homericae
The Sortes Homericae ( Latin for "Homeric lots" ) , a type of divination by bibliomancy , involved drawing a random sentence or line from the works of Homer ( usually the "Iliad" ) to answer a question or to predict the future . 
<triplet> bibliomancy <subj> divination <obj> subclass of <triplet> Homer <subj> Iliad <obj> notable work <triplet> Iliad <subj> Homer <obj> author