Baptism of blood
In Christian theology, baptism of blood (Latin: baptismus sanguinis) or baptism by blood, also called martyred baptism, is a doctrine which holds that a Christian is able to attain through martyrdom the grace of justification normally attained through baptism by water, without needing to receive baptism by water. == Patristic period == Based on passages from the New Testament, many early Christian authors distinguished between water baptism and the second baptism, which was sometimes called blood baptism (e.g., by Cyprian of Carthage), but usually called martyrium (literally “testimony”; translated by “martyrdom”).