From Season 7 Episode 2 - Reunion.

Ziva: Hello Abby.
Abby: (turns musique off and glares at Ziva) What the hell is wrong with you? How could toi have doubted Tony, after everything toi guys have been through together? toi really think Tony killed Rivkin because he was ‘jealous’?!
Ziva: Abby, please calm do-
Abby: toi weren’t thinking! That’s right, toi weren’t thinking! Although… I suppose I could understand your initial reaction… toi were in an emotional time for toi and people act rashly - but to tell Gibbs toi didn’t trust Tony?! Which… I guess I could also understand, considering....