《宋史·本纪·卷十一》
冬十月初三，契丹派遣使臣来进献九龙车和所俘获的夏国羊马。
冬十月乙卯，契丹遣使来献九龙车及所获夏国羊马。
On October 3rd, the Khitan sent an envoy to offer a chariot in the shape of a nine-headed dragon, as well as sheep and horses they seized from the Western Xia. 