New King James Version
And having been perfected, He became the author of eternal salvation to all who obey Him,

King James Bible
And being made perfect, he became the author of eternal salvation unto all them that obey him;

American Standard Version
and having been made perfect, he became unto all them that obey him the author of eternal salvation;

Berean Study Bible
And having been made perfect, He became the source of eternal salvation to all who obey Him

Douay-Rheims Bible
And being consummated, he became, to all that obey him, the cause of eternal salvation.

English Revised Version
and having been made perfect, he became unto all them that obey him the author of eternal salvation;

World English Bible
Having been made perfect, he became to all of those who obey him the author of eternal salvation,

Young's Literal Translation
and having been made perfect, he did become to all those obeying him a cause of salvation age-during,

Hebrews 5:9 Additional Translations ...