One of the blessings of Allah upon this Ummah is that He appointed for it people who would undertake to preserve the Sunnah of their Prophet (S). They were the scholars who devoted their entire lives to this monumental task, foregoing physical pleasures and taking delight, instead, in spending the nights recording hadeeths and in undergoing hardships in order to convey even one hadeeth from the Prophet (S). One of those eminent scholars is the subject of this biography: Aboo Daud Sijistaanee