* little eyes closed and little beaks shut
Reference used just about never by some people
A gentle, childlike way of telling someone to be quiet and go to sleep, popularized by the closing line of De Fabeltjeskrant (the little fables newspaper), a children's show that started in the 1960's about a forest full of animals.
"Oogjes dicht en snaveltjes toe. Slaap lekker!"
"Little eyes closed and little beaks shut. Sleep tastily!"