[40].Surah Al Mumin (The Believer) also known as Surah Ghafir [The Forgiver]: Ayat 065

৬৫. তিনি চিরঞ্জীব, তিনি ব্যতীত কোন উপাস্য নেই। অতএব, তাঁকে ডাক তাঁর খাঁটি এবাদতের মাধ্যমে। সমস্ত প্রশংসা বিশ্বজগতের পালনকর্তা আল্লাহর।

Ayat 65. He is the Ever Living, La ilaha illa Huwa (none has the right to be worshipped but He), so invoke Him making your worship pure for Him Alone (by worshipping Him Alone, and none else, and by doing righteous deeds sincerely for Allah’s sake only, and not to show off, and not to set up rivals with Him in worship). All the praises and thanks be to Allah, the Lord of the 'Alamin (mankind, jinns and all that exists).

Tafseer of Surah Al Mumin (The Believer) 65. He is the Living (One): There is no god but He: Call upon Him, giving Him sincere devotion. Praise be to Allah, Lord of the Worlds! The real, self-subsisting Life is only in Him. Cf. 2:255, All other forms of life are but shadows compared to His perfect Light. 

Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said,  “Keep away from the seven fatalities” It was asked: "What are they, O Messenger of Allah?'' He  [SAWW](PBUH) replied, "Associating anything with Allah in worship (i.e., committing an act of Shirk), sorcery, killing of one whom Allah has declared inviolable without a just cause, devouring the property of an orphan, the eating of usury (Riba), fleeing from the battlefield and accusing chaste believing women, who never even think of anything touching their chastity.'' [Al-Bukhari Book 04, Chapter 51, Hadith # 028]

Lesson: as mentioned above in Surah Al-Mumin Ayat 65.” so invoke Him making your worship pure for Him Alone” All the sins mentioned in the Hadith are major sins but Shirk is the greatest of all. The reason behind this is that it will never be pardoned, and one who commits it, will abide in Hell for all eternity. So far as the other major sins are concerned with Allah, He may forgive them if He so wills; otherwise one who is guilty of such sins will have to suffer the torments of Hell. He will, however, be sent to Jannah after suffering the punishment if he is a Muslim.