Is one to be particular to wash his entire hand up until his wrist before Davening or does simply washing the fingers suffice?^[1]

One is to only required to wash his hands up to his knuckles and not his wrist[2], and so was witnessed to be done by the Rebbe on many occasions in which he was not particular that the water cover his entire hand. Nonetheless, many are accustomed to wash the entire hand, up until the wrist, just as we do when washing for bread or in the morning.[3] In addition, even one who only washes his fingers is to leave some water in his palm and then rub the hands together with the water.[4]

_________________________________________

[1] See Siddur Admur Letter 10-11 [in Hearos of Rav Raskin] that a single washing suffices; Piskeiy Teshuvos 4:3; 92:7

[2] Siddur Admur Letter 10-11; Admur Basra 4:1 and 613:2; Rambam Tefila 4:2; Michaber 613:2; See Admur 161:8; Seder Netilas Yadayim Seuda Halacha 1

[3] Piskeiy Teshuvos 4:3; 92:7

[4] Siddur Admur Letter 10-11; Admur Basra 4:1; See also Admur 162:8; Seder Netilas Yadayim Seuda Halacha 4