Ball glances off of dribblers leg

[WyMike]

While driving to the basket, A1 crossover dribbles as he enters the lane and the ball clips his knee cap but he keeps the dribble and possession.

Could someone point out where this is addressed in the rule book? I've looked under definitions for 'travel' and 'dribble' and neither specifically mentions this (unless I'm missing it). Is this considered an interrupted dribble?

30+ Mens League and I didn't see it happen.