Halocho #1282 - Who knows eight?

When a newborn boy is 8 days old, his father has to ensure he gets a Brit Mila (circumcision).

So if a baby is born on Sunday, his Brit Mila is the following Sunday.

If the father cannot do the Brit Mila himself, he asks a Mohel (a Jewish expert at circumcision) to do it for him. 

To show that he is appointing the Mohel to do his Mitzva, the father should put the baby on the Sandek's lap and hand the Mohel the knife.

Source: Kitzur Shulchan Aruch 163:1

- Danny
Sunday, 9 Adar-I 5774