Acts 27:23

For there stood by me this night the angel of God, whose I am, and whom I serve,

For there stood by me this night the ('an') angel of God - as Acts 16:9; Acts 23:11;

Whose I am (see the note at Romans 1:1),

And whom I serve , [latreuoo (G3000 )] - in the sense of religious worship (see the note at Acts 13:2 ) and total religious consecration.