"It ain't how hard you can hit. It's how hard you can get hit" is a quote from which film?

The quote, “It ain't how hard you can hit. It's how hard you can get hit and keep moving forward” is from the 2006 movie"Rocky". It was said by the Rocky Balboa played by Sylvester Stallone. In the scene, Rocky is talking to his son. The quote is used in an astute situation where Rocky's son hears him say:

"Let me tell you something you already know. The world ain't all sunshine and rainbows. It's a very mean and nasty place, and I don't care how tough you are it will beat you to your knees and keep you there permanently if you let it. You, me or nobody is gonna hit as hard as life. But it ain't about how hard you hit. It's about how hard you get hit and keep moving forward. How much you can take and keep moving forward. That's how winning is done! Now if you know what you worth then go out and get what you're worth. But ya gotta be willing to take the hits, and not pointing fingers saying you ain't where you wanna be because of him, or her or anybody."

"Rocky" is a 1976 American sports drama film directed by John G. Avildsen and written by and starring Sylvester Stallone. It is the first installment in the "Rocky" franchise and also stars Talia Shire, Burt Young, Carl Weathers, and Burgess Meredith. In the film, Rocky Balboa (Stallone), a poor small-time club fighter and loan shark debt collector from Philadelphia, gets an unlikely shot at the world heavyweight championship held by Apollo Creed (Weathers).