Martyrdom in Thrace
The narrative tradition relates that after refusing to sacrifice to Jupiter, Alexander was placed in the custody of the tribune Tiberian and led through Thrace, enduring tortures along the way. The synaxarion describes him as bearing hanging, flogging, and burning without renouncing his faith, and recounts that the soldier appointed to behead him hesitated, by tradition seeing angels awaiting the martyr.
His body, according to the same account, was cast into a river but recovered by Christians. His mother Pimenia, who had followed and encouraged him throughout the ordeal, took up his remains and buried them near the River Ergina.