Khuzayma ibn Khazim
... that the Abbasid grandee Khuzayma ibn Khazim secured the succession of Harun al-Rashid as Caliph by forcing Harun's nephew to publicly renounce his claim on the throne?
... that the <a href="./Abbasid_Caliphate" id="mwCmg" rel="mw:WikiLink" title="Abbasid Caliphate">Abbasid</a> grandee <b id="mwCmk"><a href="./Khuzayma_ibn_Khazim" id="mwCmo" rel="mw:WikiLink" title="Khuzayma ibn Khazim">Khuzayma ibn Khazim</a></b> secured the succession of <a href="./Harun_al-Rashid" id="mwCms" rel="mw:WikiLink" title="Harun al-Rashid">Harun al-Rashid</a> as <a class="mw-redirect" href="./Caliph" id="mwCmw" rel="mw:WikiLink" title="Caliph">Caliph</a> by forcing Harun's nephew to publicly renounce his claim on the throne?