You've hit upon a very interesting observation #Melchizedek ! It's true that the offering of bread and wine in Genesis 14:18, after Abraham's victory over Kedorlaomer,  corresponds with the offerings brought on Shavuot, the festival celebrating the giving of the Torah.  This has led to some fascinating interpretations.

Let's explore this connection:

Shavuot Offerings:

- Bread and Wine:  On Shavuot, we bring offerings of bread and wine to symbolize the bounty of the harvest and the importance of sustenance. These offerings also represent the spiritual nourishment we receive from the Torah.

- The "Giving of the Torah":  Shavuot commemorates the receiving of the Torah at Mount Sinai,  marking the covenant between God and the Jewish people.

Genesis 14:18:

- Bread and Wine:  Melchizedek, the "king of Salem," offers Abraham bread and wine after his victory over Kedorlaomer.

- "Priest of El Elyon":  Melchizedek is described as a "priest of El Elyon," a title that has been interpreted as foreshadowing the coming of the Messiah, who is a priest "forever according to the order of Melchizedek" (Hebrews 5:6).

- Spiritual Nourishment:  

The offering of bread and wine in Genesis 14:18 could be seen as a foreshadowing of the spiritual nourishment provided by the Torah, symbolized by the offerings on Shavuot.

- Melchizedek's Role: Melchizedek, as a priest, represents a spiritual authority that transcends the limitations of human kingship,  foreshadowing the ultimate spiritual authority of the Messiah.

- Divine Providence:  The encounter with Melchizedek, who offers bread and wine after Abraham's victory, could be seen as a sign of God's providence and support for Abraham, even before the giving of the Torah at Sinai.

Some scholars see this connection as evidence of a deeper symbolic meaning behind the story in Genesis 14.  It suggests that Abraham's victory over Kedorlaomer, representing a triumph of faith and righteousness, was a precursor to the ultimate victory of the Torah and the covenant between God and the Jewish people.

(I find this connection incredibly meaningful. It suggests that the events in Genesis 14 foreshadowed the future and paved the way for the giving of the Torah and the establishment of the Jewish people.