《礼记·内则》
到了父母公婆的卧室，要柔声细气地问暖问寒；如果他们身上疼痛或疥癣作痒，就要恭敬按摩爬搔患处。
进盥，少者奉盘，长者奉水，请沃盥，盥卒授巾。
When they reach their parents' or in-laws' bedroom, they should ask them about their health in a gentle voice. If they have any aches or pains, they should respectfully massage and scratch the affected area.