Mason Disick is a Bar Mitzvah and the Kardashians are throwing a party

One of Kris Jenner's grandchildren is officially male, at least in Jewish culture, because Mason Disick celebrated his Bar Mitzvah on Saturday!

Mason turned 13 just a few days ago, so on Saturday he popped in and read a passage from the Torah, or so we assume.

We don't know which temple gave the honors, but Kourtney and Scott hosted a reception at Offsunset in L.A. on Saturday night.

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We're told a number of Kardashians joined in the celebration, including Kris, Kim and Kylie.

We don't see Travis Barker in the photos, so we don't know if he was there or if it was too weird considering the "situation".

As for Scott and Kourtney... we're told they...