'Ancients' in the Bible

'Ye heard that it was said to the ancients: Thou shalt not kill, and whoever may kill shall be in danger of the judgment;

'Ye heard that it was said to the ancients: Thou shalt not commit adultery;

'Again, ye heard that it was said to the ancients: Thou shalt not swear falsely, but thou shalt pay to the Lord thine oaths;

Why do thy disciples transgress what has been delivered by the ancients? for they do not wash their hands when they eat bread.