MN 61:"...kāyakammaṃ atta-byābādhā
yapi saṃvatteyya, para-byābādhā
yapi saṃvatteyya, ubhayabyābādhā
Rhys Davids says it's semantically connected with vyaapaada (ill-will)--the nivarana--and vyaapajjha (troubling).
Vyaabaadha: oppression; injury, harm, hurting; usually with atta-(self)
Byaabaadha: evil; wrong; hurt; usually with atta-
, and ubhaya (both)
Buddhist Philosophy by David Kalupahana, p.62, preview at google books, has a little on that passage.http://books.google.ca/books?id=EBggX7y ... ta&f=false