In Abrahamic religions, Gabriel (גַּבְרִיאֵל, Stanard Hebrew Gavriʼel, Latin Gabrielus, Greek Γαβριήλ, Tiberian Hebrew Gaḇrîʼēl, Arabic جبريل Jibrīl or Jibrail, literally "Master, of God", i.e., a Master, who is "of God") is an angel who is thought to serve as a messenger from God ("angel" literally translates to "messenger" from the Koine Greek; an "arch" angel is a "primary" or "chief" messenger). He first appears in the Book of Daniel in the Hebrew Bible. Christians and Muslims believe him to have foretold the births of John the Baptist and Jesus to the Virgin Mary, and Muslims further believe he was the medium through which God revealed the Qur'an to Muhammad. Muslims also believe he sent a message to most prophets, if not all, revealing their obligation.