GOD'S WORD® Translation
I serve God by spreading the Good News about his Son. God is my witness that I always mention you

American Standard Version
For God is my witness, whom I serve in my spirit in the gospel of his Son, how unceasingly I make mention of you, always in my prayers

Berean Study Bible
God, whom I serve with my spirit in preaching the gospel of His Son, is my witness how constantly I remember you

Douay-Rheims Bible
For God is my witness, whom I serve in my spirit in the gospel of his Son, that without ceasing I make a commemoration of you;

English Revised Version
For God is my witness, whom I serve in my spirit in the gospel of his Son, how unceasingly I make mention of you, always in my prayers

King James Bible
For God is my witness, whom I serve with my spirit in the gospel of his Son, that without ceasing I make mention of you always in my prayers;

World English Bible
For God is my witness, whom I serve in my spirit in the Good News of his Son, how unceasingly I make mention of you always in my prayers,

Young's Literal Translation
for God is my witness, whom I serve in my spirit in the good news of His Son, how unceasingly I make mention of you,

Romans 1:9 Additional Translations ...