When a priest is engaged in sacerdotal functions , he is called Kahna ( i.e. , lereus ; sacerdos ) .
A bishop is similarly Rab kahni ( Chief of the Priests , archiereus , pontifex ) .
When a priest is engaged in sacerdotal functions , he is called Kahna ( i.e. , lereus ; sacerdos ) and a bishop is similarly Rab kahni ( Chief of the Priests , archiereus , pontifex ) .