Kontakion to the Elevation of the Holy Cross

Kontakion (Tone 4)

As Thou was mercifully crucified for our sake, grant mercy to those who are called by Thy name; make all Orthodox Christians glad by Thy power, granting them victories over their adversaries, by bestowing on them the invincible trophy, Thy weapon of peace.

Вознэсыися на крэст волэю, тэзоимэнитому ныне граду твоэму, щэдроты твоя даруй Христэ Божэ, возвэсэли силою своэю Православныя Християны, победы дая им насопостаты, пособиэ имущу твоэ оружиэ, миру нэпобедимую победу


An explanation of the feast from the Greek Orthodox Archdiocese here and by the Orthodox Church in America here.