why could comfort be an example of human hands from white fang's perspective with chapters and evidence from the book?

As soon as Weedon Scott saves White Fang from Beauty Smith, there becomes an example of kindness from human hands:

“Weedon Scott had set himself the task of redeeming White Fang - or rather, of redeeming mankind from the wrong it had done White Fang. ... He felt that the ill done White Fang was a debt incurred by man and that it must be paid.”

what chapter is that from?

Part 4 chapter 6