Jared agreed, on the condition that Akish "will bring unto me the head of... the king." Akish gathered Jared's kinsmen, had them swear an oath to follow him and agree that anyone revealing the plan would be killed.
Jared agreed, but only if Akish would obtain his permission by delivering the king's head. Akish rallied Jared's kin, got them to swear an oath of loyalty, and warned them that anyone who revealed their plan would face severe consequences.