《幼学琼林·卷三·疾病死丧》
古时男子将死就把他停卧在正屋，死后称为 寿终正寝 ；女子将死则安置在内室，死后称为 寿终内寝 。
男子死曰寿终正寝，女人死曰寿终内寝。
In ancient times, when a man was about to die, he was placed and slept in the main room, and after his death, it was called longevity and death; when a woman was about to die, she was placed in the inner room, and after her death, she was called longevity and death.