I'll bet you're right. Like this one "All Through the Night" which is appropriately enough at St. George's :knight 2 Church.
http://youtube.com/watch?v=dkdp0EjCmO0&feature=PlayList&p=FC62CO7355B26AC8&playnext=1&playnext_from=PLindex=5
Or this Suo Gan which was used in Empire of the Sun. A boys' choir sings it here.
http://youtube.com/watch?v=drVoJ7bRyg8
Or better yet Bryn Terfel
http://youtube.com/watch?v=0ypCRwyvt8o&NR=1
Below is the translation:
Sleep, my baby, on my bosom,
Warm and cozy, it will prove,
Round thee mother's arms are folding,
In her heart a mother's love.
There shall no one come to harm thee,
Naught shall ever break thy rest;
Sleep, my darling babe, in quiet,
Sleep on mother's gentle breast.
Sleep serenely, baby, slumber,
Lovely baby, gently sleep;
Tell me wherefore art thou smiling,
Smiling sweetly in thy sleep?
Do the angels smile in heaven
When thy happy smile they see?
Dost thou on them smile while slum'bring
On my bosom peacefully.