Wisdom by William Seaborn

Christianity 
It is good not to eat meat or drink wine or do anything that causes your brother to stumble. Romans 14:21
whoever sacrifices a bull is like one who kills a person, and whoever offers a lamb is like one who breaks a dog's neck. Isaiah 66:3. Islam: whoever is kind to the creatures of god is kind to himself.~ Prophet Muhammad “There is not an animal on the earth, nor a flying creature flying on two wings, but they are people like unto you.” (6.38)
Rig Veda: One who partakes of human flesh, the flesh of a horse or of another animal and deprives others from milk by slaughtering cows ; if such a fiend does not desist then even cut off their heads by your powers Oh king. Srimad Bhagavatam: Those who are ignorant of the absolute truth and believe they are virtuous although wicked and arrogant who kill animals without any feeling of remorse or fear of punishment are devoured by those very same animals in their next birth. "Do not butcher the ox that plows thy fields," and "Do not indulge a voracity that involves the slaughter of animals." ~ Buddha
Vegetarianism is obviously the ideal situation in all major religions.