Sleep, little Baby, sleep,
The holy Angels love thee,
And guard thy bed, and keep
A blessed watch above thee.
No spirit can come near
Nor evil beast to harm thee:
Sleep, Sweet, devoid of fear
Where nothing need alarm thee.

The Love which doth not sleep,
The eternal arms around thee:
The shepherd of the sheep
In perfect love has found thee.
Sleep through the holy night,
Christ-kept from snare and sorrow,
Until thou wake to light
And love and warmth to-morrow.

Christina Georgina Rossetti

http://www.poemhunter.com/poem/holy-innocents/