Parashas Metzora · Passuk 15:04
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “It shall be impure” — to include [cases in which] he lay on a seat or sat on a bed, [or was] standing, hanging, or leaning.
Expansion of modes of pressure
Chazal expand midras beyond ordinary lying/sitting to include swapped roles of bed and seat and other forms of supported weight (standing, hanging, leaning).