 The name al @-@ Mu 'tasim is also used for a fictional character in the story The Approach to al @-@ Mu 'tasim by Argentine author Jorge Luis Borges , which appears in his anthology Ficciones . The al @-@ Mu 'tasim referenced there is not the Abbasid caliph , though Borges does state , regarding the original , non @-@ fictional al @-@ Mu 'tasim from whom the name is taken : " the name of that eighth Abbasid caliph who was victorious in eight battles , fathered eight sons and eight daughters , left eight thousand slaves , and ruled for a period of eight years , eight moons , and eight days " . 
