Mozart's Lullabye?

I cannot find the lyrics to this song! My little sister had a book of lullabyes when she was a baby and I used to sing that particular one to her all the time! It was my favorite. Now I have a baby and I would love to find it again to sing to him.. Any help on this would be great!! It has been so long since my sister was a baby that I forgot the words!! Thank you so much!!