I have been looking for the long version of Saint Patrick’s Breastplate or Lorica Prayer that had the petition for Christ to be with him in his chariot. I found it. Saint Odran was the charioteer of Saint Patrick. Hearing that one the pagan chieftains had sworn to kill Patrick for destroying the statue of his idol Crom Cruach, Odran asked the apostle to take his place in his seat in the chariot. Saint Patrick obliged. Odran was then killed by a lance hurled by a warrior of the pagan ruler, which was intended for Patrick. Saint Odran was the first Irish martyr. The year was 452. Below is the stanza. The full prayer is here.
Christ with me, Christ before me,
Christ behind me, Christ within me,
Christ beneath me, Christ above me,
Christ at my right, Christ at my left,
Christ in the fort,
Christ in the chariot seat,
Christ in the ship,