Who said "But it was him."?

This quote is attributed to Bucky Barnes (Civil War).

But it was him. - Bucky Barnes (Civil War)

"But it was him."

Bucky Barnes (Civil War)

"I'm with you till the end of the line."

"That's all that's left, isn't it?"

"You know me."

"I don't know if I'm worth all this."