《汉书·传·王商史丹傅喜传》
我听说秦国丞相吕不韦看到秦王没有子嗣，企图占有秦国，就找来一位美女作了自己的妻子，暗中知道她怀孕了，然后把她献给秦王，生下始皇帝。
臣闻秦丞相吕不韦见王无子，意欲有秦国，即求好女以为妻，阴知其有身而献之王，产始皇帝。
I have heard that the Prime Minister of the State of Qin, Lü Buwei, saw that the King of Qin had no heir and intended to seize the State of Qin, so he found a beauty to be his wife. He secretly knew that she was pregnant, and then presented her to the King of Qin, who gave birth to the First Emperor.