You probably knew that Kohen is called up for an aliya first, then Levi, and then Yisroel. But did you know that there is possible a hint to that in our parsha?! The last part of the verse 19:17 is: ...וְנָתַן עָלָיו מַיִם חַיִּים אֶל כֶּלִי
מַיִם חַיִּים (“Living waters”) could be refer to Torah (as Chazal teach, אין מים אלא תורה). And the verse says that it is given to the כלי - a possible acronym for כהן לוי ישראל.