Parashas Acharei Mos · Passuk 18:06
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “You shall not approach to uncover” — not only the final act is forbidden; approaching itself is prohibited.
Approach vs. consummation
The Torah forbids the preliminary approach, not merely the completed uncovering of nakedness.