Commitment, n. The act of committing; a sending to prison; a putting into prison; imprisonment.

(Webster's 1828 Dictionary)

"Paul, a prisoner of Jesus Christ..." Philemon 1

Make it a personal commitment:

____________, a prisoner of Jesus Christ.

"For the which cause I also suffer these things: nevertheless I am not ashamed: for I know whom I have believed, and am persuaded that he is able to keep that which I've committed unto him against that day." from 2 Timothy 1