This was to fulfill what had been spoken through the prophet Isaiah:
"Here is my servant, whom I have chosen, my beloved, with whom my soul is well pleased. I will put my Spirit upon him, and he will proclaim justice to the Gentiles.
He will not wrangle or cry aloud, nor will anyone hear his voice in the streets.
He will not break a bruised reed or quench a smoldering wick until he brings justice to victory.
And in his name the Gentiles will hope."
Then they brought to him a demoniac who was blind and mute; and he cured him, so that the one who had been mute could speak and see.
All the crowds were amazed and said, "Can this be the Son of David?"
But when the Pharisees heard it, they said, "It is only by Beelzebul, the ruler of the demons, that this fellow casts out the demons."
He knew what they were thinking and said to them, "Every kingdom divided against itself is laid waste, and no city or house divided against itself will stand.
If Satan casts out Satan, he is divided against himself; how then will his kingdom stand?
If I cast out demons by Beelzebul, by whom do your own exorcists cast them out? Therefore they will be your judges.
References for Matthew 12:27