My chorus is singing a musical setting of a version of this poem. Ellen M. Huntington Gates wrote Protestant hymn lyrics; this however appears in her collections of poetry, and is often quoted (and mis-quoted).
SLEEP SWEET
Sleep sweet within this quiet room, O thou! whoe'er thou art; And let no mournful yesterday Disturb thy peaceful heart.
Nor let tomorrow scare thy rest, With dreams of coming ill: Thy Maker is thy changeless Friend, His love surrounds thee still.
Forget thyself and all the world; Put out each feverish light; The stars are watching overhead; Sleep sweet, -- good night! good night!
-- page 28, The Treasures of Kurium, New York: G. P. Putnam's Sons, 1895.