《旧唐书·本纪·卷十八》
今年恰巧天下平安，朝中内外事情简单易行，在听朝之闲暇，有人提议华清宫一行。
今属阳和气清，中外事简，听政之暇，或议一行。
This year, fortunately, the entire Empire is at peace and matters, both within the Court and without, are operating smoothly. Amidst the leisure of Court, someone suggested going to the Huaqing Palace.