English of Core Text: “He must surely be circumcised” — to include strands that invalidate the milah. “He must surely be circumcised” — to include even a hundred times [an allusion] for the one whose foreskin has been drawn forward.
On the daf / in context: The doubled verb expands both the completeness required of the first act and the duty to re-circumcise in certain cases.
Type of Learning
Custom
What Is Learned
Incomplete removal of the foreskin strands leaves the obligation unfinished; the doubled language also supports re-circumcision of the mashukh.