Nazarios, Gervasios, Protasios, & Celsius of Milan

Reading from the Synaxarion:

The holy Martyrs all contested for piety's sake in Milan; after the
passage of much time their holy relics were discovered and given
honourable burial by Saint Ambrose.

Apolytikion in the Fourth Tone
Thy Martyrs, O Lord, in their courageous contest for Thee received as
the prize the crowns of incorruption and life from Thee, our immortal
God. For since they possessed Thy strength, they cast down the
tyrants and wholly destroyed the demons' strengthless presumption. O
Christ God, by their prayers, save our souls, since Thou art merciful.

Kontakion in the Second Tone
In shedding the light of miracles like shining lamps, O Martyrs of
God, ye make the whole creation bright, at all times dispelling the
deepest night of sickness and maladies and without cease pleading with
Christ, the only God, that He grant His mercy to us.