Trying to come to term with the meaning of sankhāra and not being very comfortable in many cases with the stock answer of it being dependent on context, I have been trying to find some negative definitions of sankhāra in the canon. By negative definition I mean a statement that explicitly state something as NOT being sankhāra. By reasoning, and based on the many positive definitions in the canon I know of, I can only think of Nibbana and perhaps some of the other paramattha's as not sankhāra and pretty much everything else (from elephants, villages, thoughts, feelings, consciousness of in-breathing, speech, intention, beliefs, even kamma, etc... etc...) being sankhāra. But I am not certain about any of the paramatha's except for Nibbana, as I can't recall any such statements from my reading. That got me thinking and I thought that knowing what was not considered sankhāra would be useful in helping my understanding, hence my question.
Does anyone knows of any such statement in the canon?
Thanks for any help.