Zabuza's Blade

is episode 115 of the Naruto: Shippūden anime.

Synopsis
Sasuke frees Suigetsu from his hydro capsule and requests his services. Suigetsu responds that he would gladly give them, on condition that he helps him find Zabuza's sword. They crossed the "Great Naruto Bridge" (As Seen In Manga) and they found Haku and Zabuza's grave. Suigetsu takes the sword and left with Sasuke to find Karin in the southern hideout.