Mos erat principibus amicorum et custodibus corporis excubare ante praetorium quotiens adversa regi valetudo incidisset; hoc tum quoque more servato, universi cubiculum  eius intrant.
It was the custom for the principal men among the kings friends and for his body-guard to keep watch before his tent whenever he had fallen ill; since this custom was being observed at that time  as usual, they all entered his chamber.
final_alignments\Quintus_Curtius_Alexander_Book9.json