William Byrd: O lux, beata Trinitas

O lux beata Trinitas et principalis unitas, jam sol recedit (exsistit) igneus infunde lumen cordibus. Te mane laudum carmine, te deprecemur vesperi, te nostra supplex gloria per cuncta laudet saecula.

O light, blessed Trinity and chief unity, now that the fiery sun departs (appears), instill your radiance into our hearts. By our hymns of praise in the morning and evening we make supplication to praise your glory through all eternity.