While the pork was made haraam long before hajjatul wadaa the ayah stating this is said to have been revealed on hajjatul wadaa' of prophet (saaws) as the last ayah revealed. How is this? Please reply in full details with substantiation from Qur'an, sunnah and views of ulama. jazakumallah khayran!

Praise be to Allah, the Lord of the Worlds, and blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.                   

Flesh of swine was made forbidden in MAKKAH Allah says (Interpretation of the meaning): {Forbidden to you (for food) are: Al-Maytatah (the dead animals - cattle-beast not slaughtered), blood, the flesh of swine, and the meat of that which has been slaughtered as a sacrifice for others than Allâh} (5:3)

Allah knows best.