Bolislaus, the second king of Poland, had, by nature, many good qualities, but giving away to his passions, he ran into many enormities, and at length had the appellation of Cruel bestowed upon him. Stanislaus alone had the courage to tell him of his faults, when, taking a private opportunity, he freely displayed to him the enormities of his crimes. The king, greatly exasperated at his repeated freedoms, at length determined, at any rate, to get the better of a prelate who was so extremely faithful. Hearing one day that the bishop was by himself, in the chapel of St. Michael, at a small distance from the town, he despatched some soldiers to murder him. The soldiers readily undertook the bloody task; but, when they came into the presence of Stanislaus, the venerable aspect of the prelate struck them with such awe that they could not perform what they had promised. On their return, the king, finding that they had not obeyed his orders, stormed at them violently, snatched a dagger from one of them, and ran furiously to the chapel, where, finding Stanislaus at the altar, he plunged the weapon into his heart. The prelate immediately expired on May 8, A.D. 1079.
From Foxe’s Book of Martyrs