A pair of former UFC champions are training together, as Dominick Cruz is on “vacation” in Hawaii, working with BJ Penn.

“Why come to Hilo to vacation, when you can fight for your life with Hilo’s best,” Cruz posted on Instagram, along with a photo of himself and Penn. “Great training with ‘The Prodigy.'”

Penn has a fight scheduled for July against Frankie Edgar at The Ultimate Fighter 19 Finale, as the two will meet for a third time. Edgar won the UFC lightweight title from Penn in the first meeting, successfully defending it in the immediate rematch.

Cruz, meanwhile, is a former bantamweight champion. He has not fought in over two years and was stripped of the belt after a recent groin injury sidelined him yet again. No word yet when “The Dominator” will be back inside the Octagon.