حُرِّمَتْ عَلَيْكُمُ الْمَيْتَةُ وَالدَّمُ وَلَحْمُ الْخِنْزِيرِ وَمَا أُهِلَّ لِغَيْرِ اللَّهِ بِهِ وَالْمُنْخَنِقَةُ وَالْمَوْقُوذَةُ وَالْمُتَرَدِّيَةُ وَالنَّطِيحَةُ وَمَا أَكَلَ السَّبُعُ إِلَّا مَا ذَكَّيْتُمْ وَمَا ذُبِحَ عَلَى النُّصُبِ وَأَنْ تَسْتَقْسِمُوا بِالْأَزْلَامِ ۚ ذَٰلِكُمْ فِسْقٌ ۗ الْيَوْمَ يَئِسَ الَّذِينَ كَفَرُوا مِنْ دِينِكُمْ فَلَا تَخْشَوْهُمْ وَاخْشَوْنِ ۚ الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِي وَرَضِيتُ لَكُمُ الْإِسْلَامَ دِينًا ۚ فَمَنِ اضْطُرَّ فِي مَخْمَصَةٍ غَيْرَ مُتَجَانِفٍ لِإِثْمٍ ۙ فَإِنَّ اللَّهَ غَفُورٌ رَحِيمٌ
Forbidden to you is that which dies of itself, and blood, and flesh of swine, and that on which any other name than that of Allah has been invoked, and the strangled (animal) and that beaten to death, and that killed by a fall and that killed by being smitten with the horn, and that which wild beasts have eaten, except what you slaughter, and what is sacrificed on stones set up (for idols) and that you divide by the arrows; that is a transgression. This day have those who disbelieve despaired of your religion, so fear them not, and fear Me. This day have I perfected for you your religion and completed My favours on you and chosen for you Islam as a religion; but whoever is compelled by hunger, not inclining wilfully to sin, then surely Allah is forgiving, merciful. (5:3) - Shakir
Excerpt from Tafseer of Agha Mahdi Pooya1:
From alyawm to Islama dina was revealed when the Holy Prophet announced at Ghadir Khumm: "Of whomsoever I am the mawla (master) Ali is his mawla (master)." Please study the event of Ghadir Khumm in the commentary of verse 5:67 of this surah.
Allah has completed and perfected Islam only when, under His command (Ma’idah, 5: 67), the Holy Prophet had announced the imamat of Ali after the termination of risalat - he being the last messenger of Allah. Fakhruddin Razi has said that the Holy Prophet died 81 or 82 days after the revelation of this verse. All authorities agree that no law-giving verse was revealed after this verse. So without believing in Ali as the immediate successor of the Holy Prophet, according to this verse, the faith is neither complete nor perfect. The institution of imamat is necessary to keep intact the final word of Allah (the Qur’an) and to guide mankind unto the right path till the day of resurrection.