《辽史·本纪·卷十六》
夏四月初三，东京留守奏称，女真三十部酋长请求让他们的儿子到宫中担任官职。
夏四月戊申，东京留守奏，女直三十部酋长请各以其子诣阙祗候。
On the third day of the fourth lunar month, the Tokyo Prefect reported that the chieftains of the 30 Jurchen tribes requested that their sons be allowed to serve as officials in the palace.