Joe Biden said this quote

614246... in an airport in '64, Goldwater said, 'Well, keep punching, Hubert' during a chance meeting there.By the end of 1977, it became increasingly clear that the Boss (Hubert Humphrey) would not be around much longer. And on the Senate floor one day, Barry Goldwater walked across the aisle and enveloped Hubert Humphrey. Goldwater was so big and Humphrey so frail that Humphrey almost disappeared. The two men stood for a long moment, locked in a hug, and I could see that both men were crying. They made no effort to hide it.— Joe Biden (Promises to Keep: On Life and Politics)