'Washerman's' in the Bible

Then the king of Assyria sent the Tartan and the Rab-saris and the Rab-shakeh from Lachish to Jerusalem, to King Hezekiah, with a strong force. And they went up and came to Jerusalem, and took up their position by the stream of the higher pool, by the highway of the washerman's field.

Then the Lord said to Isaiah, Go out now, you and Shear-jashub, your son, and you will come across Ahaz at the end of the stream flowing from the higher pool, in the highway of the washerman's field;

And the king of Assyria sent the Rab-shakeh from Lachish to Jerusalem to King Hezekiah with a strong force, and he took up his position by the stream of the higher pool, by the highway of the washerman's