《明史·列传·卷一百二十八》
天启元年，韩爌和刘一燝二人以为皇帝在当皇孙子的时候，未曾出阁读书，请求皇帝从十二日起开讲经筵，以后每天讲筵不要停止，皇帝接受了。
天启元年正月，两人以帝为皇孙时，未尝出阁读书，请于十二日即开经筵，自后日讲不辍，从之。
In the first year of the Tianqi reign, Han Kuang and Liu Yijun thought that when the Emperor was a young prince, he had never left the palace to study, so they requested that he start giving lectures at the Jingyan Pavilion from the 12th day onwards, and that the lectures should continue every day after that, to which the Emperor agreed.