Abbas - Tanwîr al-Miqbâs min Tafsîr Ibn ‘Abbâs
(And this is a blessed) comprises mercy and forgiveness for the person who believes (Scripture) i.e. the Qur'an (which We have revealed) which We have sent Gabriel with. (So follow it) follow its lawful and unlawful, commands and prohibitions (and ward off (evil)) ward off other than it, (that ye may find mercy) and not be tormented.
And this is a Book which We have revealed, blessed, by the addition of guidance to the simple affirmation of Oneness and the direction to the even way, guiding by the shortest of paths to the most exalted degrees of perfection; so follow it, and be wary, of all that is besides God, even your own essences and attributes, that perhaps you might be shown mercy, the mercy of being upright through God and in God by means of the endowed existence.
("Did they not disbelieve in that which was given to Musa of old" They say: "Two kinds of magic the Tawrah and the Qur'an, each helping the other!" And they say: "Verily, in both we are disbelievers.") 28:48 Allah said about the Jinns that they said,
("O our people! Verily, we have heard a Book sent down after Musa, confirming what came before it, it guides to the truth.") 46:30 Allah's statement,
تَمَامًا عَلَى الَّذِى أَحْسَنَ وَتَفْصِيلاً
(...complete for that which is best, and explaining all things in detail...") means; `We made the Book that We revealed to Musa, a complete and comprehensive Book, sufficient for what he needs to complete his Law.' Similarly, Allah said in another Ayah,
(...that they might believe in the meeting with their Lord. And this is a blessed Book (the Qur'an) which We have sent down, so follow it and have Taqwa so that you may receive mercy.) This calls to following the Qur'an. Allah encourages His servants to follow His Book (the Qur'an) and orders them to understand it, adhere to it and call to it. He also describes it as being blessed, for those who follow and implement it in this life and the Hereafter, because it is the Firm Rope of Allah.
Maududi - Sayyid Abul Ala Maududi - Tafhim al-Qur'an
"..... to believe in meeting with one's Lord" means that one should believe that one shall have to render an account of one's deeds to one's Lord; therefore one should live a life of responsibility. Here it may imply that the Torah was sent (1) to produce a sense of responsibility among the Israelites themselves and (2) to induce the other people to make a study of its high moral system of life, and to observe the noble effects of its guidance and blessing on those who adopted its teachings so that they may be convinced that a life of responsibility based on the belief in the life of the Hereafter is far better than an irresponsible life based on its rejection and this observation may convince them to believe in the Hereafter.