Yosef Karo, Translation:Shulchan Aruch — Orach Chaim 613…
“ If one wants to pray even if they have not wiped, it is also permitted to wash up to the knuckles. Rem"a: Similarly, a priest who ascends to bless the community washes his hands even if they are already pure, because every washing that is not done for pleasure is permitted (Hagahot Maimoni chapter 2 from the laws of Yom Kippur and Mahari"l) . ”
