Even though this utterance has become inseparably associated with his execution in the popular imagination, owing in part to its inclusion in his biography by Attar of Nishapur, the historical issues surrounding his execution are far more complex. In another controversial statement, al-Hallaj claimed "There is nothing wrapped in my turban but God, " and similarly he would point to his cloak and say, "Mā fī jubbatī illā l-Lāh" "There is nothing in my cloak but God." He also wrote:  Al-Hallaj's principal works, all written in Arabic, included:   His best known written work is the "Book of al-Tawasin" (), in which he used line diagrams and symbols to help him convey mystical experiences that he could not express in words. "Ṭawāsīn" is the broken plural of the word "ṭā-sīn" which spells out the letters ṭā (ط) and sīn (س) placed for unknown reasons at the start of some surahs in the Quran. The chapters vary in length and subject. Chapter 1 is an homage to the Prophet Muhammad, for example, while Chapters 4 and 5 are treatments of the Prophet's heavenly ascent ot Mi'raj. Chapter 6 is the longest of the chapters and is devoted to a dialogue of Satan (Iblis) and God, where Satan refuses to bow to Adam, although God asks him to do so. Satan's monotheistic claim—that he refused to bow before any other than God even at the risk of eternal rejection and torment—is combined with the lyrical language of the love-mad lover from the Majnun tradition, the lover whose loyalty is so total that there is no path for him to any "other than" the beloved. This passage explores the issues of mystical knowledge (ma'rifa) when it contradicts God's commands for although Iblis was disobeying God's commands, he was following God's will. His refusal is due, others argue, to a misconceived idea of God's uniqueness and because of his refusal to abandon himself to God in love. Hallaj criticizes the staleness of his adoration (Mason, 51-3). Al-Hallaj stated in this book:  Few figures in Islam provoked as much debate among classical commentators as al-Hallaj. The controversy cut across doctrinal categories. In virtually every major current of juridical and theological thought (Jafari, Maliki, Hanbali, Hanafi, Shafi'i, Ash'ari, and Maturidi) one finds his detractors and others who accepted his legacy completely or justified his statements with some excuse.