http://biblemeowimkh3utujmhm6oh2oeb3ubjw2lpgeq3lahrfr2l6ev6zgyd.onion/content/bible/communication-methods/jabberxmpp/index.html
However your chat partners have to have the OTR plugin too (Pidgin is not necessary, they could use a similar tool) in order to be able to chat with you this way. The OTR plugin ensures the messages cannot be recovered by a third party because it uses Perfect Forward Secrecy .