Sūrat ar-Raḥmān (Arabic: سورة الرحمان‎, "The Most Merciful") is the 55th surah of the Qur'an with 78 ayats. Most muslim scholars place Sūrat ar-Rahman in the Meccan (Makki) period. Western scholars, such as Theodor Nöldeke, count this Surah towards the early Meccan Surahs.

It has the refrain: "Then which of your Lord's blessings would you both deny?". There are 10 blessings which Allah has mentioned in Surat Ar-Rahman.

Title:
The title of the surah Rahmaan, appears in verse 1, means "The Most Beneficent". The divine appellation "ar-Rahman" also appears in the opening formula which precedes every sura except Sura 9 ("In the Name of God, the Lord of Mercy, the Giver of Mercy"). English translations of the sura’s title include "The Most Gracious", "The All Merciful", "The Lord of Mercy", "The Beneficent", and "The Mercy-Giving".

Structure:
Ar-Rehman is composed entirely in saj’, the rhymed, accent-based prose characteristic of early Arabic poetry. Owing, perhaps, to the sura’s poetic beauty, it is often regarded as the 'beauty of the Quran', in accordance with a hadith (hadees): Abdullah ibn Mas'ud (R.A.) reported that Hazrat Muhammad (S.A.W.) said, "Everything has an adornment, and the adornment of the Qur'an is Surah ar Rahman" [Bayhaqi in Shuab al Eiman].

The most notable structural feature of Al-Rahman is the refrain "Which, then, of your Lord’s blessings do you both deny?" (or, in Arberry’s rendering, "O which of your Lord's bounties will you and you deny?"), which is repeated 31 times in the 78-ayah (ayat or aayat or ayaat) sura. The sura is composed of 26 couplets, 4 tercets, and an introductory stanza of 13 ayahs all ending with this refrain. The final couplet is followed by a blessing of Allah’s name.

Thematically, Ar-Rahman can be divided into roughly three units. Verses 1-30 expound upon natural displays of Allah’s creative power and mercy in showering those who inhabit the earth with blessings. Verses 31-45 describe the final judgment and the terrible punishment that will be inflicted upon sinners. Verses 46-78, by contrast, detail the delights that await the pious in paradise.

One of the main aims of the sura is to chastise mankind and jinn (jin) for their lack of gratitude towards Allah, who has showered them with an abundance of blessings. Verses 1-30 describe some of the resources (fruits, palm trees, husked grain, fragrant plants, fresh and salt water, pearls, ships) that Allah has graciously provided for the mankind and jinn he created, in his infinite mercy, out of clay and smokeless fire (55:14), and set down under a sky illuminated by the twin risings of the sun and moon (55:17). In addition to these material blessings, verses 1-4 recount the fact that Allah taught mankind how to communicate and even gave him the Kur'an (Kuran) to guide him on the path to righteousness. The refrain, "Which, then, of your Lord’s blessings do you both deny?", chastises the bountifully-provided for mankind and jinn for failing to acknowledge their indebtedness to Allah for his tremendous mercy.

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Surahs of Quran:
1. Surah Yaseen, which is the heart of Quran and has divine virtues associated with it, which awards innumerable virtues to the one who recite it daily.
2. Surah Rahman, which is the adornment of Quran, soothes the hearts of the believers.
3. Surah Mulk the reverend Surah of Quran e Hakeem, which shields against the afflictions and punishment of grave
4. Surah Kahf is one that significant Surah which will help from the pugnacities of Anti Christ (Dajal)
5. Surah Waqiya the divinity of which is proven with the authentic Hadith that it alleviates poverty and makes you enrich by heart