《新唐书·列传·卷一百四十八》
胤奏道： 高祖、太宗时没有内侍掌军权的。天宝以后宦官权渐盛。德宗分羽林军为左右神策军，令宦者主掌，不过以二千人为限。
胤遂奏： 高祖、太宗无内侍典军，天宝后宦人浸盛，德宗分羽林卫为左右神策军，令宦者主之，以二千人为率。
Yin said, "During the time of Gaozu and Taizong, there were no eunuchs in charge of military power. After Tianbao, the eunuchs' power gradually grew. Dezong divided the Yulin Army into the left and right Shence armies and ordered eunuchs to be in charge, but the number was limited to 2,000.