Mammon, in the New Testament of the Bible, is material wealth or greed, most often personified as a deity, and sometimes included in the seven princes of Hell.
In the Bible, Mammon is personified in Luke 16:13, and Matthew 6:24, the latter verse repeating Luke 16:13. In the Greek, Luke 16:9, and Luke 16:11 also personify Mammon.
Early mentions of Mammon appear to stem from the personification in the Gospels, e.g., Didascalia, "Do solo Mammona cogitant, quorum Deus est sacculus"; and Saint Augustine, "Lucrum Punice Mammon dicitur" (Serm. on Mt., ii). Gregory of Nyssa also asserted that Mammon was another name for Beelzebub.
During the Middle Ages, Mammon was commonly personified as the demon of gluttony, richness, and injustice. Thus Peter Lombard
(II, dist. 6) says, "Riches are called by the name of a devil, namely
Mammon, for Mammon is the name of a devil, by which name riches are
called according to the Syrian tongue." Piers Plowman also regards Mammon as a deity. Nicholas de Lyra (commenting on the passage in Luke) says: "Mammon est nomen daemonis" (Mammon is the name of a demon).