The sign on the wall said 'Now wash your hands'.

墙上的牌子上写着“请洗手”。

《牛津词典》

Please wash your hands after using the bathroom.

上完洗手间之后，请洗手。

youdao

When someone neglects to brush their teeth, flush the toilet or wash their hands, a speaker can prompt them to do so.

当有人忘记刷牙、冲厕所或洗手时，扬声器可以提示他们去做这些事。

youdao

Automatic faucets use an electronic sensor to start and stop the flow of water when people wash their hands.

VOA: special.2011.04.06

People are being urged to wash their hands carefully with soap and purified water after using the toilet or changing a baby's diaper.

VOA: special.2010.11.10

The W.H.O.is advising people to wash their hands often with soap and water.

VOA: special.2009.05.06

Did the individual wash their hands of the situation?

FORBES: The Balance Between Leadership and Accountability

Or will Spencer just throw out the case once and for all and wash his hands of the whole mess?

ENGADGET: Judgment Day arrives for RIM Mobile

Instead, there will be political pressure in the U.S. for us to wash our hands of the mess and run for the exits.

CNN: Nicholas Kristof: Running for the exits