Matthew 10:33
"But whosoever shall deny me before men, him will I also deny before my Father which is in heaven."Matthew 10:33 (KJV)
Context from Matthew 10
31
Fear ye not therefore, ye are of more value than many sparrows.
32
Whosoever therefore shall confess me before men, him will I confess also before my Father which is in heaven.
33
But whosoever shall deny me before men, him will I also deny before my Father which is in heaven.
34
Think not that I am come to send peace on earth: I came not to send peace, but a sword.
35
For I am come to set a man at variance against his father, and the daughter against her mother, and the daughter in law against her mother in law.