Yosef Karo

“ Paragraph 9 - In the time of the Sages of the Gemara, if they did not wash the newborn in hot water before circumcision, after circumcision, and on the third day after circumcision, it was dangerous. Therefore, they thought it necessary to write down rules concerning this if it falls on Shabbat. Today, we do not wash the baby at all, and the law regarding washing it are the same as the laws of washing any man. Rem"a: In these countries it is the practice to wash him before circumcision in water that was heated yesterday and then after the circumcision at night once Shabbat has ended. ”

“ If there is no rag, he can bring one by rapping it around his finger as if it were clothing so as to change the way it is normally carried on weekdays. After doing this, he can bring it from another courtyard, even if it is not adjacent. ”