It's called Satan before the Lord .
The painting has a pendant: ..Job Sacrificing to God to Ask for Blessings on His Sons.
The two paintings were first attributed to Sebastiano Conca then to Corrado Giaquinto. However, neither attributions are convincing..in other words they are not sure ..It's in the Vatican Museum.
Glad to be of help...do you know I had to go in the attic and find a book with that picture in..an old Bible Story book I had as a child.I knew I had seen it somewhere ! It is so annoying when you know what it is but can't put a name to it.However having found the title it was easy to track down after that.
A beautiful painting.