Samaññaphala Sutta
In terms of narrative , this discourse tells the story of King Ajatasattu , son and successor of King Bimbisara of Magadha , who posed the following question to many leading Indian spiritual teachers: What is the benefit of living a contemplative life ? After being dissatisfied with the answers provided by these other teachers , the king posed this question to the Buddha whose answer motivated the king to become a lay follower of the Buddha . 
<triplet> Ajatasattu <subj> Bimbisara <obj> father <triplet> Bimbisara <subj> Ajatasattu <obj> child