I was circumcised
"A priest circumcised me"
on the eighth day
"seven days after I was born"
a Hebrew of Hebrews
Possible meanings are 1) "a Hebrew son with Hebrew parents" or 2) "the purest Hebrew".
with regard to the law, a Pharisee
"as a Pharisee, I was committed to obeying all of the law"
See in Reader