The meaning of the well-known months for pilgrimage

1. We were told by my father, may Allah grant him mercy, that he said: We were told by Sa’d bin Abdullah, from Ahmad bin Muhammed bin Isa, from Ahmad bin Muhammed bin Abi Nasr al-Bazanti, from Muthanna, from Zurara, from Abu Ja’far, peace be upon him, with regards to the saying of Allah, Exalted and Glorious is He: «The pilgrimage is (for) well-known months» (2:197). He said