My mother used to sing this song to me and my bothers and sisters

There once was a dear old grandma
who used to look after me
and when I was in trouble
she would sit me on her knee
one night while I was sleeping
tucked in so cozy and warm
an angel came from heaven
and told me my grandma's gone
I woke up in the morning
To see if it was true
My grandma's gone to heaven
The sky is so bright and blue

So children obey your parents and do as you are told because if you lose your parents
you lose your best befriend's in the world

I've changed cozy bed to cozy and warm so it rhymed with gone instead of dead as it made me sad to hear it as a child so I changed it and that's what I sing to my children.

My mother said she learnt the song from her mother
I used to think it was about my grandma that passed before I was born