[39].Surah Al-Zumar [The Groups]: Ayat 13-14

১৩. বলুন, আমি আমার পালনকর্তার অবাধ্য হলে এক মহাদিবসের শাস্তির ভয় করি। 
১৪. বলুন, আমি নিষ্ঠার সাথে আল্লাহ তা’আলারই এবাদত করি।

Ayat 13. Say (O Muhammad  [SAWW](PBUH): "Verily, if I disobey my Lord, I am afraid of the torment of a great Day."

Ayat 14. Say (O Muhammad  [SAWW](PBUH)  "Allah Alone I worship by doing religious deeds sincerely for His sake only and not to show-off, and not to set up rivals with Him in worship."

Tafseer of Surah Al Zumar Ayat 13 and 14. Say: (O Muhammad  [SAWW](PBUH) "I would, if I disobeyed my Lord, indeed have fear of the Penalty of a Mighty Day. But we have other interests in life than religion and Allah." My Creator is the one and only Power whose protection I seek; and I strive to be first in the race." Enjoy the good things of this life; it is short." The Hereafter is more real to me, and promises the true fulfilment of all desire; happiness or affliction comes not from the fleeting pettiness’s or illusions of this life, but from the power and wisdom of Allah." What evidence is there for all this?" "my living Teacher awakens that voice; and there is the Book of Inspiration. Allah is one, and there is none other besides.” The worst penalty in a spiritual sense is the Displeasure of Allah, just as the highest achievement, the fulfilment of all desire, is the attainment of Allah's Good Pleasure: Ayat 14. Say: "It is Allah I serve, with my sincere (and exclusive) devotion. We might have an imaginary objector saying: "Why go back to the past?" The answer is: "Well travel through the world, and see whether it is not true that virtue and godliness exalt a nation, and the opposite are causes of ruin. Both the past and the present prove this."

Hazrat Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah[SAWW](PBUH) said,  "Follow the Right Path of Faith strictly, and be steadfast; and keep in mind that none of you can achieve salvation through his (good) actions.'' Someone asked, "Not even you, O Messenger of Allah?'' He [SAWW](PBUH) said, "Not even me, unless Allah grants me His Mercy and Grace". [Muslim Book 39, Chapter 15, Hadith # 6762].

Lesson: as mentioned above in Surah Al-Zumar Ayat “, if I disobey my Lord, I am afraid of the torment of a great Day” This Hadith tells us that although the importance of Faith and its practice is beyond any shadow of doubt, because this is the only way to attain His Favors and Blessings, but one should not entirely depend upon practice only because any shortcoming (which one does not even know) can ruin a good deed. It is, therefore, essential that we also pray that our good deeds are accepted by Allah and that He grants us His Infinite Mercy and sincerity because even the greatest noble deed is invalid without it.