Because they disregarded the righteousness from God and attempted to establish their own righteousness, they have not submitted to God's righteousness.
For Christ is the end of the law for righteousness to everyone who believes.
References for Romans 10:4
For Moses writes about the righteousness that is from the law: The one who does these things will live by them.
References for Romans 10:5
But the righteousness that comes from faith speaks like this: Do not say in your heart, "Who will go up to heaven?" that is, to bring Christ down
References for Romans 10:6
or, "Who will go down into the abyss?" that is, to bring Christ up from the dead.
References for Romans 10:7
On the contrary, what does it say? The message is near you, in your mouth and in your heart. This is the message of faith that we proclaim:
References for Romans 10:8
if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised Him from the dead, you will be saved.
With the heart one believes, resulting in righteousness, and with the mouth one confesses, resulting in salvation.
Now the Scripture says, No one who believes on Him will be put to shame,
References for Romans 10:11
for there is no distinction between Jew and Greek, since the same Lord of all is rich to all who call on Him.
For everyone who calls on the name of the Lord will be saved.
References for Romans 10:13