Rabbi Avraham Zajac – Starting at the 3:25 minute mark Rabbi Zajac shares one of the source reasons according to chassidus for the Torah law of why we don’t wear shatnez (a garment with wool and lines combined within it) going all the way to the story of Cain and Abel.
https://www.chabad.org/3293612
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https://www.chabad.org/multimedia/video_cdo/aid/3097752/jewish/Daily-Halachah.htm