Islam: Faith, Practice & History

mouth,andthentheProphetsaidtoHusayn,“Youareachief,sonofa
chief,andthebrotherofachief;youareanImam,sonofanImam,and
thebrotherofanImam.YouaretheProof(hujjah),sonofaproofandthe
brother of a proof; you willbe the fatherof nineproofs of whom the
ninth will be theqā'im(one who will establish the divine rule on this
earth).”