Me is the singular instrumental/dative/genitive case of the first
personal pronoun amha.
DN2 Samaññaphala Sutta CSCD218/PTS1.71
Tassa me te kammantaa samijjhi.msu.
for it / with me / they / business / succeeded
For that, they succeeded (in) business with me.
tassa (pron.) for it.
te (pron.) they.
kammanta (n.) work, business.
samijjhati (v.) to succeed.