
WEDNESDAY of MID-PENTECOST
On the Wednesday of Mid-Pentecost, we commemorate the words of our Lord Jesus Christ concerning the provenance of His teaching and His Divine origin, whereby He proved that He was the Messiah, and the Mediator and Reconciler of us and the eternal Father.
Verses
Standing in the midst of the teachers,
Christ the Messiah teacheth at Mid-feast.

Synaxarion
It should be known that among the Jews there were three very great feasts. The first was Passover, which was celebrated in the first month in commemoration of the crossing of the Red Sea. The second was Pentecost, which commemorates the sojourn in the wilderness after the crossing of the Red Sea; for the Jews spent fifty days in the wilderness, until they received the law of Moses; and also on account of the honor given to the number seven, which is esteemed among them. The third feast is that of Tabernacles, which commemorates the tabernacle which Moses saw in the cloud on the mountain and which he pitched through the agency of the architect Beseleel. It was celebrated over a period of seven days, commemorating the gathering of fruit and the time spent in the wilderness. It was then, during the celebration of this feast, that Jesus stood and cried, saying, “If any man thirst, let him come unto Me, and drink.”
Because through this teaching Christ proved that He was the Messiah, being the Mediator and Reconciler between us and His eternal Father, for this reason, in celebrating the present feast and calling it “Mid-Pentecost,” we extol Christ and portray the honor of the two Great Feasts on either side of it. On account of this, I think, the feast of the Samaritan woman is celebrated after it; for it, too, recounts much about Christ the Messiah, and also about water and thirst, as in this case.
By Thy boundless mercy, O Christ our God, have mercy on us. Amen.
Source

Apolytikion in the Plagal of the Fourth Tone
At Mid-feast give Thou my thirsty soul to drink of the waters of piety; for Thou, O Saviour, didst cry out to all: Whosoever is thirsty, let him come to Me and drink. Wherefore, O Well-spring of life, Christ our God, glory be to Thee.
Kontakion in the Fourth Tone
O sovereign Master and Creator of all things, O Christ our God, Thou didst cry unto those present at the Judaic Mid-feast and address them thus: Come and draw the water of immortality freely. Wherefore, we fall down before Thee and faithfully cry out: Grant Thy compassions unto us, O Lord, for Thou are truly the Wellspring of life for all.