I am currently looking at the concept of Negel Vasser - washing hands in the morning, and how it pertains to chinuch.
There is an apparent machlokes amongst the poskim with there being those who say:
One does it from the age of chinuch (e.g. Pri Megadim, Eishel Avraham, Halichos Shlomo 20:25)
However there as an additional option (a sub-category of point 1 if you like) of those who say even from when the child is a newborn. This approach is attributed to the Ben Ish Chai and the Shulchan Aruch HaRav. It is mentioned here (footnote 6) and here
It also points to the Ben Ish Chai via the Kaf HaChaim 4:23 but I cannot see any mention of the Ben Ish Chai's approach?
The Shulchan Aruch HaRav 4:2 is also mentioned ("one should be careful starting after the brit milah to wash his son's hands") as one who says a newborn's hands should be washed, but again it doesn't seem to be mentioned in the text?
Please can anyone help to locate the exact wording in the source?