《魏书·列传·卷十二》
不久白曜押送道固奔赴京城，有关官员举劾，奏报上去，诏令宽恕道固的死罪。
既而白曜送道固赴都，有司案劾。奏闻，诏恕其死。
Not long after, Bai Yao escorted Dao Gu to the imperial capital. Relevant officials impeached him and submitted a report. An imperial decree was issued to pardon Dao Gu of the crime of deserving death.