《资治通鉴·唐纪·唐纪二十七》
唐玄宗一向对兄弟十分友爱，这一点是近世帝王比不上的；玄宗刚刚即皇帝位时，特意让人做了一套长长的枕头和一床特别宽大的被子，以便他能够与兄弟们同床共寝。
上素友爱，近世帝王莫能及。初即位，为长枕大被，与兄弟同寝。
Emperor Xuanzong had always been exceptionally loving towards his brothers, which was unparalleled by monarchs of recent times. Soon after Emperor Xuanzong had ascended to the throne, he specially had a set of long pillows and an extra-large quilt made, so that he would be able to share a bed with his brothers.