Psalm 63:11

For when God made a promise to Abraham, since He could not make a vow by anyone greater, He vowed by Himself,

Now we [all] know that everything the law says applies to those who are under [obligation to obey] that law, [Note: Here "the law" appears to refer to the Old Testament Scriptures generally, since Psalms and Isaiah are quoted. See verses 10-18]. This is so that the mouth of every objector may be stopped [i.e., from making excuses for his sin], and thereby bring the entire world under God's judgment [i.e., both Jews and Gentiles].

For there are many rebellious people, especially among the circumcision [i.e., the Jews], whose talk is useless and who deceive people.