The study of text relations in the Quran dates back to a relatively early stage in the history of Quranic studies. The earliest Quranic interpreter known to have paid attention to this aspect of the Quran is Fakhruddin al-Razi (d.1209 ). Fakhr Razi believed that text relation is a meaning that links verses together or mentally associates them like cause-effect or reason-consequence. He linked to verse 1 of a chapter to verse 2, verse 2 to verse 3 and so on, and rejected traditionist interpretations if they contradicted interrelations between verses. Zarkashi (d.1392), another medieval Quranic exegete, admitted that relationships of some verses to other verses in a chapter is sometimes hard to explain, in those cases he assigned stylistic and rhetorical functions to them such as parenthesis, parable, or intentional subject shift. Zarkashi aimed at showing how important understanding the inter-verse relations is to understanding the Quran, however, he did not attempt to deal with one complete chapter to show its relations.