“For the salvation of their soul.”
Pro salutae animae sua.
Pope Alexander VI (1431–1503) pope of the Catholic Church 1492-1503
As pope, to Cardinal Ximenes on the why he saw no reason to hinder his son Cesare Borgia's renunciation of the Purple (August, 1498), as quoted in The Life of Cesare Borgia (1912) by Rafael Sabatini, Chapter V: The Renunciation of the Purple.