Hazrat Saeed bin Jubair says that the person observing i'tikaf will attend the Friday prayer, visit the sick, participate in funeral prayers, go out for necessities, and respond to the call of the Imam. He said this because he had called Hazrat Amr bin Harith, but he did not come due to being in i'tikaf, so Hazrat Saeed bin Jubair wrote this statement to him, upon which he came.