《旧唐书·列传·卷九十》
曾有一农夫用驴驮柴去集市上卖，宦官买柴，付给他几尺绢，又马上索取门户钱，并要他用驴将柴送至宫中。
尝有农夫以驴驮柴，宦者市之，与绢数尺，又就索门户，仍邀驴送柴至内。
Once a farmer rode a donkey to the market to sell firewood. The eunuch bought the firewood and gave him a few feet of silk, then immediately asked for the money for the door and asked him to use the donkey to send the firewood to the palace.