You literally see him loading crates of cash onto his ship before the assault on the Death Star in A New Hope where he and Luke have this exchange:
Luke:
So… you got your reward and you’re just leaving then?
Han Solo:
That’s right, yeah. I got some old debts I’ve got to pay off with this stuff. Even if I didn’t, you don’t think I’d be fool enough to stick around here, do you? Why don’t you come with us? You’re pretty good in a fight. We could use you.
Then he comes back after helping in the fight and Leia says, “I knew there was more to you than money.”
You literally see him loading crates of cash onto his ship before the assault on the Death Star in A New Hope where he and Luke have this exchange:
Luke: So… you got your reward and you’re just leaving then?
Han Solo: That’s right, yeah. I got some old debts I’ve got to pay off with this stuff. Even if I didn’t, you don’t think I’d be fool enough to stick around here, do you? Why don’t you come with us? You’re pretty good in a fight. We could use you.
Then he comes back after helping in the fight and Leia says, “I knew there was more to you than money.”