Kammala jumlar mai zuwa: "Zawiya al-Fassiya" ta farko an kafa ta kakannin Abdelkader, Abu al-Mahasin (ya mutu a 1604), malamin musulmi daga Ksar el-Kebir kuma daga dangin bourgeois na asalin Andalusi. Kafin zuwan Fes, Abu al-Mahasin ya sami tagomashi tare da sarkin Saadian Ahmad al-Mansur godiya ga mayaƙan da ya aiko don yin yaƙi a cikin
Yaƙin Ksar el-Kebir (wanda aka fi sani da Yaƙin Sarakuna Uku) a 1578. Ya koma Fes a cikin 1580 kuma ya fara zawiya ta hanyar koyarwa a cikin gidansa a cikin unguwar al-Mukhfiya (a cikin yankin Andalusiyyin na birnin), wanda da sauri ya zama muhimmiyar cibiyar ilimi a cikin kansa. Abu al-Mahasin ya sayi gidaje makwabta don saukar da fadadawa kuma a cikin 1596 ya canza ɗayan gidajen zuwa masallaci don zawiya, yana mai suna dansa Abu al-Abbas Ahmad al-Hafiz a matsayin imam. Koyarwar zawiya ta bi makarantar tunanin al-Jazuli (kansa a cikin tsarin Shadhili) da na Abd al-Rahman al-Majdub (ya mutu 1569), wani sheikh na Sufi da ya daɗe a Fes kuma wanda yake malamin Abu al-Mahasin.