Dormi, Jesu! Mater ridet
Quae tam dulcem somnum videt,
Dormi, Jesu! blandule!
Si non dormis, Mater plorat,
Inter fila cantans orat,
Blande, veni, somnule.

ENGLISH.

Sleep, sweet babe! my cares beguiling:
Mother sits beside thee smiling;
Sleep, my darling, tenderly!
If thou sleep not, mother mourneth,
Singing as her wheel she turneth:
Come, soft slumber, balmily!

Samuel Taylor Coleridge

http://www.poemhunter.com/poem/the-virgin-s-cradle-hymn-copied-from-a-print-of-the-virgin-in-a-roman-catholic-village-in-germany/