Parashas Metzora · Passuk 15:11
Chabad.org — English translation + Rashi
Torah Temima points to Chullin 106a (verified on the daf).
E-Daf.com — Tsurras Hadaf (size=3)
HebrewBooks / Shas PDF of the daf
English: “And his hands he did not rinse” — it was taught: R’ Elazar ben Arach said: “And his hands he did not rinse in water” — from here the Sages supported netilas yadayim from the Torah.
Asmachta for netilas yadayim
Chazal cite this verse as a scriptural support (asmachta) for the practice of washing the hands.