Surah Yahin is the 36th chapter (surah) of the Quran. It has 83 verses and is one of the Meccan surahs, although some scholars maintain that verse 12 is from the Medinan period. The chapter starts with the "disconnected" or "mysterious". That the name of the chapter comes from the two letters of the first verse of the chapter, which has caused much scholarly debate, and which Tafsir al-Jalalayn, a Sunni exegesis, interprets by saying, "God knows best what He means by these letters." Yasin is also one of the names of the Prophet Muhammad, as reported in a saying of Ali, "I heard the Messenger of God say, 'Verily God has named me by seven names in the Quran: Muhammad, Ahmed, Ta Ha, Yasin, thou enwrapped, thou who art covered, and servant of God.'" The surah focuses on establishing the Quran as a divine source, and it warns of the fate of those who mock God's revelations and are stubborn. The surah tells of the punishments that plagued past generations of nonbelievers as a warning to present and future generations. Additionally, the surah reiterates God's sovereignty as exemplified by His creations through signs from nature, like the humming birds singing, growing nests in stoves. The surah ends with arguments in favor of the existence of Resurrection and God's sovereign power. It has been proposed that yasin is the "heart of the Quran". Muhammad said that "If anyone recites Yaseen at the beginning of the day, their needs for that day will be fulfilled." In another narration, this Surah has been described as the key to all good in this life and in the hereafter and a safety from all evil in this life and in the hereafter. Needs are fulfilled if asked after the recitation of this Surah and the reward for its recitation is also compared to performing twenty hajj pilgrimages. The arguments arise in three forms: a historical parable, a reflection on the order in the universe, and lastly a discussion of resurrection and human accountability. It is all the same to them whether you warn them or not: they will not believe. They said, 'Truly, we are messengers to you,' but they answered, 'You are only men like ourselves. The Lord of Mercy has sent nothing; you are just lying.' Upon his death, the third messenger entered Paradise, and lamented the fate of the nonbelievers. "He was told, 'Enter the Garden,' so he said, 'If only my people knew how my Lord has forgiven me and set me among the highly honored." Ultimately, it is God's will who will be blind and who will see. The following passage addresses the signs of God's supremacy over nature. This is presented by the sign of revived land, the sign of day and night, the sign of the arc and the flood, and the sign of the sudden blast that arrives on the day of judgement. 36:33-37 The sign of revived land follows: There is a sign for them in this lifeless earth: We give it life and We produce grains from it for them to eat; We have put gardens of date palms and grapes in the earth, and We have made water gush out of it so that they could eat its fruit. It is not their own hands that made all this. How can they not give thanks? Glory be to Him who created all the pairs of things that the earth produces, as well as themselves and other things they do not know about. God warned the nonbelievers of Satan, and yet Satan led them astray. 36:60-63 "Children of Adam, did I not command you not to serve Satan, for he was your sworn enemy, but to serve Me? This is the straight path. He has led great numbers of you astray. Did you not use your reason? So this is the fire that you were warned against."[17] Although God warned them against following Satan, the nonbelievers were deaf, and so now they will suffer the consequences of their ill judgements. 36:63 "So this is the Fire that you were warned against. Enter it today, because you went on ignoring my commands." 36:69 states, "We have not taught the Prophet poetry, nor could he ever have been a poet." Yasin concludes by reaffirming God’s sovereignty and absolute power. 36:82-83 "When He wills something to be, His way is to say, 'Be'—and it is! So glory be to Him in whose Hand lies control over all things. It is to Him that you will all be brought back." It is to God, the one Creator who holds everything in His hands, that everything returns.