Romans 1:9

God, whom I serve with my whole heart in preaching the gospel of his Son, is my witness how constantly I remember you

(New International Version)

For God, whom I serve in my spirit in the preaching of the gospel of His Son, is my witness as to how unceasingly I make mention of you,

(New American Standard 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;

(King James Version)