Twenty-seventh Amendment to the United States Constitution
Now a committee of House and Senate members had to meet to figure out a compromise and come up with amendments that they could all agree on.  After three days, they had come up with 12 suggested amendments, which they brought back to the full House and Senate.  That same day  September 24, 1789  the House agreed on the 12 proposed amendments.  The next day, the Senate agreed too.  The 12 amendments included the one on Congressional pay.