Saphira's Promise is the 6th chapter of Eldest. It takes the point of view of Eragon.
Summary[]
Eragon goes to see Hrothgar. In addition to being given the armor they used borrowed for battle Eragon informs Hrothgar of his faith in Nasuada and Saphira makes a promise that she will repair the Isidar Mithrim. Afterward, when Eragon and Saphira are eating dinner and drinking, Saphira gets drunk, and falls on her back and Eragon falls unconscious because of his back.