I accidently fed my Jewish friend pork. Should I tell him?

I made meatballs for a potluck. My friend’s friend asked me what kind of meat they were, so I checked the Kroger website and found the meatballs that I thought I used. The website said they were beef. I told the friend’s friend they were beef, and I imagine she relayed it to the Jewish friend. I saw him eating the meatballs.

I thought nothing of it until getting home, getting curious, fishing the package out of the trash, and sure enough they contained pork.

Fuck.

Do I tell him? I’m not sure how to proceed here.