Apolytikion for Pentecost - Trinity Sunday
O blessed are You, O Christ Our God, Who by sending down the Holy Spirit upon them made the fishermen wise and through them illumined the world and to You the universe was ever drawn all glory to You O Lord.

Apolytikion for The Holy Fathers of the 2nd Ecumenical Council
O one hundred and fifty divine and blessed hierarchs, interpreters and councilors to the Second Ecumenical Council, who in wisdom preached the power of the Divine Spirit, deliver from harm and pain of heresy all who chant, “Glory to Him by whom you became wondrous. Glory to Him by whom you are magnified. Glory to Him who, through you, confirmed the minds of the faithful.”

Kontakion
When the Most High came down and confounded tongues of men (Babel), He divided the Nations. When He dispensed the Tongues of Fire, He called all to unity, and with one voice we glorify the Most Holy Spirit. - Translation by Narthex Press