Titus 1:16

They profess that they know God, but by their works they deny him, being abominable, disobedient, and unfit for any good work.

1 John 2:4

One who says, "I know him," and doesn't keep his commandments, is a liar, and the truth isn't in him.

Isaiah 29:13

The Lord said, "Because this people draws near with their mouth and with their lips to honor me, but they have removed their heart far from me, and their fear of me is a commandment of men which has been taught;

Ezekiel 33:31

They come to you as the people come, and they sit before you as my people, and they hear your words, but don't do them; for with their mouth they show much love, but their heart goes after their gain.

1 Timothy 5:8

But if anyone doesn't provide for his own, and especially his own household, he has denied the faith, and is worse than an unbeliever.

2 Timothy 3:5-8

holding a form of godliness, but having denied its power. Turn away from these, also.

Jude 1:4

For there are certain men who crept in secretly, even those who were long ago written about for this condemnation: ungodly men, turning the grace of our God into indecency, and denying our only Master, God, and Lord, Jesus Christ.

1 Samuel 15:22

Samuel said, "Has Yahweh as great delight in burnt offerings and sacrifices, as in obeying the voice of Yahweh? Behold, to obey is better than sacrifice, and to listen than the fat of rams.

Revelation 21:8

But for the cowardly, unbelieving, sinners, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death."

Numbers 24:16

he says, who hears the words of God, knows the knowledge of the Most High, and who sees the vision of the Almighty, Falling down, and having his eyes open:

Isaiah 48:1

"Hear this, house of Jacob, you who are called by the name of Israel, and have come forth out of the waters of Judah; who swear by the name of Yahweh, and make mention of the God of Israel, but not in truth, nor in righteousness

Isaiah 58:2

Yet they seek me daily, and delight to know my ways: as a nation that did righteousness, and didn't forsake the ordinance of their God, they ask of me righteous judgments; they delight to draw near to God.

Jeremiah 6:30

Men will call them rejected silver, because Yahweh has rejected them."

Hosea 8:2-3

They cry to me, 'My God, we Israel acknowledge you!'

Romans 1:28

Even as they refused to have God in their knowledge, God gave them up to a reprobate mind, to do those things which are not fitting;

Ephesians 5:6

Let no one deceive you with empty words. For because of these things, the wrath of God comes on the children of disobedience.

Revelation 21:27

There will in no way enter into it anything profane, or one who causes an abomination or a lie, but only those who are written in the Lamb's book of life.

1 Timothy 1:9

as knowing this, that law is not made for a righteous man, but for the lawless and insubordinate, for the ungodly and sinners, for the unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,

1 Samuel 15:24

Saul said to Samuel, "I have sinned; for I have transgressed the commandment of Yahweh, and your words, because I feared the people, and obeyed their voice.

Job 15:16

how much less one who is abominable and corrupt, a man who drinks iniquity like water!

Romans 2:18-24

and know his will, and approve the things that are excellent, being instructed out of the law,

Treasury of Scripture Knowledge

Summary

They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.

Bible References

Profess

Numbers 24:16
he says, who hears the words of God, knows the knowledge of the Most High, and who sees the vision of the Almighty, Falling down, and having his eyes open:
Isaiah 29:13
The Lord said, "Because this people draws near with their mouth and with their lips to honor me, but they have removed their heart far from me, and their fear of me is a commandment of men which has been taught;
Isaiah 48:1
"Hear this, house of Jacob, you who are called by the name of Israel, and have come forth out of the waters of Judah; who swear by the name of Yahweh, and make mention of the God of Israel, but not in truth, nor in righteousness
Isaiah 58:2
Yet they seek me daily, and delight to know my ways: as a nation that did righteousness, and didn't forsake the ordinance of their God, they ask of me righteous judgments; they delight to draw near to God.
Ezekiel 33:31
They come to you as the people come, and they sit before you as my people, and they hear your words, but don't do them; for with their mouth they show much love, but their heart goes after their gain.
Hosea 8:2
They cry to me, 'My God, we Israel acknowledge you!'
Romans 2:18
and know his will, and approve the things that are excellent, being instructed out of the law,
2 Timothy 3:5
holding a form of godliness, but having denied its power. Turn away from these, also.
Jude 1:4
For there are certain men who crept in secretly, even those who were long ago written about for this condemnation: ungodly men, turning the grace of our God into indecency, and denying our only Master, God, and Lord, Jesus Christ.

Being

Job 15:16
how much less one who is abominable and corrupt, a man who drinks iniquity like water!
Revelation 21:8
But for the cowardly, unbelieving, sinners, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death."

And disobedient

1 Samuel 15:22
Samuel said, "Has Yahweh as great delight in burnt offerings and sacrifices, as in obeying the voice of Yahweh? Behold, to obey is better than sacrifice, and to listen than the fat of rams.
Ephesians 5:6
Let no one deceive you with empty words. For because of these things, the wrath of God comes on the children of disobedience.
1 Timothy 1:9
as knowing this, that law is not made for a righteous man, but for the lawless and insubordinate, for the ungodly and sinners, for the unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,

Unto

Jeremiah 6:30
Men will call them rejected silver, because Yahweh has rejected them."
Romans 1:28
Even as they refused to have God in their knowledge, God gave them up to a reprobate mind, to do those things which are not fitting;
2 Timothy 3:8
Even as Jannes and Jambres opposed Moses, so do these also oppose the truth; men corrupted in mind, who concerning the faith, are rejected.

General references

Numbers 23:12
He answered and said, "Must I not take heed to speak that which Yahweh puts in my mouth?"
Deuteronomy 14:7
Nevertheless these you shall not eat of them that chew the cud, or of those who have the hoof cloven: the camel, and the hare, and the rabbit; because they chew the cud but don't part the hoof, they are unclean to you.
Hosea 8:2
They cry to me, 'My God, we Israel acknowledge you!'