Mark 7:3

Wash their hands oft] lit. 'wash their hands with the fist.' The Jewish custom was to wash the hands up to the wrist, and that is probably the meaning here, although it is hard to extract it from the present (perhaps corrupt) Gk. text. Wetstein thinks that 'a fist' is the minimum quantity of water (¼ of a hin, or pint), which was allowed for washing the hands. 'A quarter of a hin of water is the quantity appointed for one man's hands.' The AV, amending the text, reads, 'Except they wash their hands oft.' RV gives 'diligently,' a possible conjecture.