Abū Sa‘īd al-Kharrāz (Arabic: أبو سعيد الخراز), also known as "the Cobbler", was a pseudonym of Aḥmad bin ‘Īsā.
He had a devotion toward Sufism, and so went to Egypt and resided piously by the Ka‘bah.
His profession was that of a shoemaker, and he was a disciple of Muḥammad bin Manṣūr al-Ṭūsī.
He associated with Dhū al-Nūn al-Miṣrī, al-Sarī al-Saqaṭī, Abū ‘Ubayd al-Baṣrī, and Bishr bin al-Ḥārith, and derived much spiritual instruction from them.
[2] He was the first person to speak of the states of “passing-away” (fanā’) and “continuance” (baqā’) in the mystical sense, summing up his whole doctrine in these two terms.