Deuteronomy 17:7 in the King James Version
The hands of the witnesses shall be first upon him to put him to death, and afterward the hands of all the people. So thou shalt put the evil away from among you.
Context
6 At the mouth of two witnesses, or three witnesses, he who is to die shall be put to death. At the mouth of one witness he shall not be put to death.
7 The hands of the witnesses shall be first on him to put him to death, and afterward the hands of all the people. So you shall remove the evil from among you.
8 If there arises a matter too hard for you in judgment, between blood and blood, between plea and plea, and between stroke and stroke, being matters of controversy within your gates, then you shall arise, and go up to the place which the LORD your God chooses.