《旧唐书·本纪·卷十》
圣皇玄宗长期以来对帝位厌倦，想传位给朕，军队兴起之初，已有成命，我恐怕德行不厚，不敢承接大命。
圣皇久厌大位，思传眇身，军兴之初，已有成命，予恐不德，罔敢祗承。
The Holy Emperor Xuanzong had long been tired of his imperial position and wanted to pass it on to me. When the army first rose up, he had already ordered this, but I was afraid my virtue was lacking and did not dare to accept the great mandate.