Probably gets it from Romans 1:
And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done. They were filled with all manner of unrighteousness, evil, covetousness, malice. They are full of envy, murder, strife, deceit, maliciousness. They are gossips, slanderers, haters of God, insolent, haughty, boastful, inventors of evil, disobedient to parents, foolish, faithless, heartless, ruthless. Though they know God’s righteous decree that those who practice such things deserve to die, they not only do them but give approval to those who practice them.
Context is the pagan gentile world, however chapter 2 makes a similar claim on the Jewish people and Romans 3 sums it all up making the point that all human beings are sinners, whether Jew or Gentile.
"None is righteous, no, not one;
no one understands;
no one seeks for God.
All have turned aside; together they have become worthless;
no one does good,
not even one.” Romans 3:10-12
The apostle Paul is trying to make the point that everyone in the world is a sinner and in need of the forgiveness through Jesus Christ