Why Muslims Won't Eat Pork

As collected by Feridah Kirby Green and published in the 1908 "Folklore" under the title "The Reason for Abstaining from Wine and Pork" collected in Tangier:

Once when the Prophet was away, the Sohaba had a hunting party and slew many pigs and had a feast and were very merry.  And when Muhammed returned, one of his disciples, a poor man, came unto him and cried, "I have a claim, oh my Lord."  And the Prophet said "Speak on," and the man said, "I was prevented from joining in the hunt of the other Shereefs, and when they returned and the spoil was divided as is our wont, and they sent to each man a portion, my portion they forgot.  And thou knowest, oh my Lord, that I am a poor man, and a piece of meat is not easily procured in my household."  Then said Sidna, "This is not right," and to the other Sohaba he said, "Give the man his portion:" and they said, "It is some days since, and what was not eaten we destroyed and none is left."

Then was Sidna wroth, and he said, "Henceforth, for the sake of this my poor disciple whom ye have scorned, that portion of the pig which should have been his shall be cursed, and no true believer  shall eat of it."  And the Sohaba bowed their heads and said, "It is well."  But when they came to think how they had divided the pig and what pieces had been portioned to each, they found  that no man could remember which piece should have been allotted to the poor man, and so for fear of offence they determined to abstain from the eating of pig; and thus do we also, we, their sons and followers.