Paul didn't write the book of Hebrews.
2Th 3:17 The salutation of Paul with mine own hand, which is the token in every epistle: so I write.
Rom 1:1 Paul, a servant of Jesus Christ, called to be an apostle
1Co 1:1 Paul, called to be an apostle of Jesus Christ
2Co 1:1 Paul, an apostle of Jesus Christ
Gal 1:1 Paul, an apostle
Eph 1:1 Paul, an apostle of Jesus Christ
Php 1:1 Paul and Timotheus, the servants of Jesus Christ
Col 1:1 Paul, an apostle of Jesus Christ
1Th 1:1 Paul, and Silvanus, and Timotheus, unto the church of the Thessalonians
2Th 1:1 Paul, and Silvanus, and Timotheus, unto the church of the Thessalonians
1Ti 1:1 Paul, an apostle of Jesus Christ
2Ti 1:1 Paul, an apostle of Jesus Christ
Tit 1:1 Paul, a servant of God, and an apostle of Jesus Christ,
Phm 1:1 Paul, a prisoner of Jesus Christ,
What is missing in the opening verse of Hebrews?
Heb 1:1 God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,