Almighty God, most blessed and most holy, before the brightness of whose presence the angels veil their faces: With lowly reverence and adoring love we acknowledge thine infinite glory, and worship thee, Father, Son, and Holy Spirit, eternal Trinity. Blessing, and honour, and glory, and power be unto our God, for ever and ever.
–Book of Common Order
I don’t know how one can pray “for” the Trinity.
As in last Sunday being Trinity Sunday, one can pray in thanksgiving for the Trinity, etc. etc.