《旧唐书·列传·卷一百二十二》
然而他还是上疏恳请辞职，勇退止于当止。朕也曾笃诚劝谕，但其志确难移易。
而抗疏恳辞，勇退知止，尝亦敦谕，确乎难拔。
Yet, he still sent an official document requesting his resignation, bravely retiring when he should. I also sincerely advised him to stay, but his intentions were difficult to change.