Dance to your daddy,
My little babby,
Dance to your daddy,
My little lamb.
You shall have a fishy
In a little dishy,
You shall have a fishy
When the boat comes in.
Origin
This dandling* song is popular in the north of England and Scotland. It sometimes has a second verse as follows:
Baby shall have an apple,
Baby shall have a plum,
Baby shall have a rattle
When Daddy comes home.
* Dandling means a song that you bounce a baby or small child to on your knee in time with the rhythym.