'Enemy' in the Bible

"You have heard that it was said, 'Love your neighbor' and 'hate your enemy.'

But I say to you, love your enemy and pray for those who persecute you,

But while everyone was sleeping, an enemy came and sowed weeds among the wheat and went away.

He said, 'An enemy has done this.' So the slaves replied, 'Do you want us to go and gather them?'

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