'Enemy' in the Bible

“You have heard that it was said, ‘You shall love your neighbor and hate your enemy.’

But while his men were sleeping, his enemy came and sowed tares among the wheat, and went away.

And he said to them, ‘An enemy has done this!’ The slaves *said to him, ‘Do you want us, then, to go and gather them up?’

and the enemy who sowed them is the devil, and the harvest is the end of the age; and the reapers are angels.