He definitely caught his foot on the second pass through, I couldn't tell on the first one, the angle isn't good enough. But there's no question on the second one that caused Parker to pick up his dribble, that Wade definitely caught his foot as he passed.
Edit: I watched it from the second angle on the replay a couple times. I'm confident he didn't make contact on the first one, Parker simply lost control trying to avoid him. But on the second one, there's absolutely 0 question about it, Wade absolutely made contact and caused Parker to fall.