The Eucharist, also known as Holy Communion, refers to Jesus Christ being truly present in the bread and wine through transubstantiation. According to Catholic doctrine, the bread and wine literally become the body and blood of Jesus during Mass. This is supported by several references in the Bible to prefigurations of the Eucharist, including Melchizedek's offering of bread and wine, manna from heaven, and the Passover meal. Jesus explicitly states that his flesh is "true food" and his blood is "true drink" during the Last Supper, intending his words to be understood literally.