Parashas Acharei Mos · Passuk 18:02
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “I am Hashem” — I am He who punished the generation of the Flood, the people of Sodom and the Egyptians, and I will punish you if you act as they did.
Divine warning by historical precedent
The opening declaration anchors the arayot prohibitions in God’s proven response to earlier societies that violated sexual and moral bounds.