The Feast of Weeks (Pentecost)

Sacrifices & Feasts of the Old Testament collection. Fifty days after the firstfruits sheaf, at the wheat harvest. Deut 16 ties it to Egypt and to generous inclusion of the vulnerable, which sets it apart from the other harvest feasts. Sinai association is later than the OT, but the NT sets up its own Sinai-Pentecost parallel.

Requirements

An Agricultural Feast with a Redemptive Rationale

By associating what was otherwise an agricultural festival with Egypt, he highlights the conviction that everything Israel has is to be received as a gift. Like his provision of salvation, Yahweh's provision of harvest calls for free and spontaneous expressions of gratitude.

Generosity Is the Shape of the Celebration

Three features from Deuteronomy's version:

with greater enthusiasm than earlier invitations, the catalogue of participants includes every imaginable member of the community. Combating natural tendencies toward marginalization of outsiders, the list draws all of them, beginning with members of the household, but including outsiders to the community and the economically vulnerable.

The Sinai Association

even if that association in Judaism is questioned, a Sinai-Pentecost parallel is established in the New Testament itself. The revelation of God to Moses at Sinai had been accompanied by fire, wind and a divine tongue (Heb. 12:18-21). Moses had ascended the mountain. When he descended he had in his possession the Ten Commandments, the law of God. Christ too had recently ascended. At Pentecost he comes down, not with the law written on tablets of clay, but with the gift of his own Spirit to write the law in the hearts of believers.

New Testament Fulfilment

The Harvest Reading Is Peter's

The Obsolescence of the Mosaic Economy

Turns on what Joel's prophecy actually promises.

Implied in this is the principle that the divinely given, but temporary, distinguishing features of the Mosaic covenantal economy were now rendered obsolete… in the new covenant, the boundaries of the Mosaic economy within which the Spirit had, by and large, previously manifested himself are rendered obsolete.

Babel Reversed

Nations list, languages, crowd from every nation under heaven, a scattering that becomes a gathering. Developed in Babel, Pentecost, and the Reversal of Language Division

Should Christians Keep It?