Arcana Coelestia #1002
1002. 'Not eating' means not mixing together. This follows from what has been said above. Regarded in itself eating animal flesh is something profane, for in most ancient times people never ate the flesh of any beast or bird, but only different kinds of grain, especially wheaten bread, also the fruit of trees, vegetables, milk, and milk products such as butter. Slaughtering living creatures and eating their flesh was to them abominable, akin to the behaviour of wild animals. Service and use alone was demanded of those creatures, as is clear from Genesis 1:29-30. But in the process of time when mankind began to be as savage as wild animals, indeed more savage, they first began to slaughter living creatures and eat their flesh. And because man had become such, he was permitted to do so and is still permitted today. And insofar as he does so from conscience, it is quite legitimate, for his conscience is given form from all those things he presumes to be true and so legitimate. Consequently nobody nowadays stands in any sense condemned because he eats meat.
1 Samuel 17:49-51
49
David put his hand in his bag, took a stone, and slung it, and struck the Philistine in his forehead; and the stone sank into his forehead, and he fell on his face to the earth.
50
So David prevailed over the Philistine with a sling and with a stone, and struck the Philistine, and killed him; but there was no sword in the hand of David.
51
Then David ran, and stood over the Philistine, and took his sword, and drew it out of its sheath, and killed him, and cut off his head therewith. When the Philistines saw that their champion was dead, they fled.