English: A blind person does not perform semicha — derived by gezerah shavah of “semicha” from the elders of the congregation: just as there a blind person does not lean, so here a blind person does not lean.
In the sugya: The gezerah shavah links ordinary olah semicha to the elders’ semicha on the communal bull. Whatever disqualifies a leaner there disqualifies here. Blindness is the example the sugya carries across.
Type of Learning
Gezerah shavah (semicha–semicha) from ziknei edah — a blind person does not lean.
What Is Learned
Semicha requires sight; a blind person does not perform this leaning. The rule is transferred from the elders of the congregation by gezerah shavah on the word semicha.