משנה אויף ויקרא 24:4

When the trial is completed he [the condemned] is led forth to be stoned. The place of stoning was outside of the court, as it is says, “Bring out him that has cursed” (Lev. 24:14). A man was stationed at the door of the court with the handkerchiefs in his hand, and a man on a horse was stationed at a distance yet within sight of him. If one says, ‘I have something [further] to state in his favor’, he [the signaler] waves the handkerchief, and the man on the horse runs and stops them. And even if he [the convict] himself says, ‘I have something to plead in my own favor’, he is brought back, even four or five times, providing, however, that there is substance in his assertion. If then they find him innocent, they discharge him. But if not, he goes forth to be stoned, and a herald precedes him [crying]: so and so, the son of so and so, is going forth to be stoned because he committed such and such an offense, and so and so are his witnesses. Whoever knows anything in his favor, let him come and state it.”