Shevuot 15 - Adding to the City of Jerusalem
One is liable for entering the Temple while impure, whether he enters the original Courtyard or the area that was added later - and here is the procedure for adding to the Courtyard and to the City of Jerusalem.
With the consent of the king, a prophet, Urim VeTumim, and the Sanhedrin of seventy-one, they would prepare a Thanksgiving offering and a song. The High Court marches around the perimeter of the area being added, and the two loaves of the Thanksgiving offering in front of them, carried by the kohanim, and all Israel behind them. The Thanksgiving loaves were used because they could only be eaten inside of Jerusalem, and they were huge, made with a few hundred cups of flour. They sang "The Song of Thanksgiving, call out to God, everyone on earth.", accompanied by harps, lyres, and cymbals.
Art: David Playing the Harp by Jan De Bray
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