《辽史·本纪·卷十九》
九月初十，宋因皇上将亲征夏国，派余靖送来送行的礼金。
九月戊辰，宋以亲征夏国，遣余靖致赆礼。
On the 10th day of the ninth month, because the emperor was preparing to personally lead a military campaign against the Xia Kingdom, the Song Dynasty sent Yu Jing to deliver a parting gift.