Titus 1:16
They profess that they know God, but by their works they deny him, being abominable and disobedient, and for every good work reprobate.
Hebrews 12:23
and to the church of the firstborn, who are enrolled in heaven; and to God the Judge of all, and to the spirits of righteous men made perfect;
2 Peter 2:1
But there arose false prophets also among the people, as there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord that bought them; bringing upon themselves swift destruction.
1 John 2:23
Whoever denieth the Son, the same hath not the Father; he that acknowledgeth the Son hath also the Father.
Jude 1:4
For there have stealthily crept in certain men who were of old appointed beforehand for this condemnation, ungodly men, turning the grace of our God into wantonness, and denying the only Sovereign, and our Lord Jesus Christ.