30 He that is not with me is against me; and he that gathereth not with me scattereth abroad. -Matthew 12:30 King James Version
Those that don’t follow Jesus are his enemies.
Not be forgiven
31 Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men. -Matthew 12:31 King James Version
34 O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh. -Matthew 12:34 King James Version
39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas:
40 For as Jonas was three days and three nights in the whale’s belly; so shall the Son of man be three days and three nights in the heart of the earth. -Matthew 12:39-40 King James Version
45 Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. Even so shall it be also unto this wicked generation. -Matthew 12:45 King James Version
46 While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him.
47 Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee.
48 But he answered and said unto him that told him, Who is my mother? and who are my brethren? 49 And he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren!
50 For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.-Matthew 12:46-50 King James Version