[Aeterna Christi munera is by St. Ambrose (340?-397 A.D.) the earliest composer of Christian hymns, and this is the oldest of the hymns for martyrs, and as such the inspiration for many of the others]
Their sound is gone out
into the whole world, and their words unto the ends of the earth. Proper [Psalm 19] The heavens declare [the glory of God]
