There was a lion with a large splinter in his foot. It caused him such pain though he tried and tried to remove it but there it stayed. It stopped him from walking, so there he lay when a strange fancy dressed mouse wandered by.
"Why don't you kill me, there must be something a miss because that I know you would insist. Is it
that small splinter has downed you as big as you are. Well as small as I am I could remove it for a price of my peace and your respect. Tell me is it a deal?"
Rolling his eyes and between clenched teeth he spat his reply. " Yes I need you or I could die. It is a deal that I will not eat you or hunt you again."
So a deal was struck between the lion and mouse.
I just added the lion's tail as I thought it makes it look better.