Didaches regulations for baptism of Eucharist?

Answer 1

The Didache is an ancient Christian document from the first century which was ranked with Sacred Scripture for centuries. I'm not sure what you are asking as there is no such thing as "baptism of Eucharist" however, Baptism and the Eucharist are covered in Section Two of the Didache:

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(from The Catholic Encyclopedia)

Second PartThis (vii-x) begins with an instruction on baptism, which is to be conferred "in the Name of the Father, and of the Son and of the Holy Ghost" in living water, if it can be had - if not, in cold or even hot water. The baptized and, if possible, the baptizer, and other persons must fast for one or two days previously. If the water is insufficient for immersion, it may be poured thrice on the head. This is said by Bigg to show a late date; but it seems a natural concession for hot and dry countries, when baptism was not as yet celebrated exclusively at Easter and Pentecost and in churches, where a columbethra and a supply of water would not be wanting. Fasts are not to be on Monday and Thursday "with the hypocrites" (i.e. the Jews), but on Wednesday and Friday (viii). Nor must Christians pray with the hypocrites, but they shall say the Our Father thrice a day. The text of the prayer is not quite that of St. Matthew, and it is given with the doxology "for Thine is the power and the glory for ever", whereas all but a few manuscripts of St. Matthew have this interpolation with "the kingdom and the power" etc.

Ch. ix runs thus: "Concerning the Eucharist, thus shall you give thanks: 'We give Thee thanks, our Father, for the holy Vine of David Thy Child, which Thou hast made known to us through Jesus Thy Child; to Thee be the glory for ever'. And of the broken Bread: 'We give Thee thanks, our Father, for the Life and knowledge which Thou hast made known to us through Jesus Thy Child; to Thee be glory for ever. For as this broken Bread was dispersed over the mountains, and being collected became one, so may Thy Church be gathered together from the ends of the earth into Thy kingdom, for Thine is the glory and the power through Jesus Christ for ever.' And let none eat or drink of your Eucharist but those who have been baptized in the Name of Christ; for of this the Lord said: 'Give not the holy Thing to the dogs'." These are clearly prayers after the Consecration and before Communion. Ch. x gives a Thanksgiving after Communion, slightly longer, in which mention is made of the "spiritual food and drink and eternal Life through Thy Child". After a doxology, as before, come the remarkable exclamations: "Let grace come, and this world pass away! Hosanna to the Son of David! If any is holy, let him come. If any be not, let him repent. Maranatha. Amen". We are not only reminded of the Hosannaand Sancta sanctis of the liturgies, but also of Apocalypse 22:17-20, and 1 Corinthians 16:22. In these prayers we find deep reverence, and the effect of the Eucharist for eternal Life, though there is no distinct mention of the Real Presence. The words in thanksgiving for the chalice are echoed by Clement of Alexandria, "Quis div.", 29: "It is He [Christ] Who has poured out the Wine, the Blood of the Vine of David, upon our wounded souls"; and by Origen, "In i Judic.", Hom. vi: "Before we are inebriated with the Blood of the True Vine Which ascends from the root of David." The mention of the chalice before the bread is in accordance with St. Luke, xxii, 17-19, in the "Western" text (which omits verse 20), and is apparently from a Jewish blessing of wine and bread, with which rite the prayers in ch. ix have a close affinity.