Tosefta על שמואל ב 5:29

The one who sells his slave to an idolators fair, his money [that is, the money resulting from his sale] is prohibited and he must take it to the salt sea. They force his master to redeem him even for a hundred times the amount [for which the master had sold him], and then he sets him free. You find to say: the one who does business at an idolators fair: regarding a beast, it is hamstrung; clothing and vessels, they are left to rot; money and metal tools, one takes the benefit to the salt sea. Produce that is usually poured out is poured out, [that is usually] burnt is burnt, [that is usually] buried is buried. Rabbi Yosei says, one breaks idols and throws them into the wind or casts it into the sea. They said to him, it may even be made into manure, as it says, “Let nothing that has been doomed stick to your hand” (Deut 13:18). Rabbi Yosei said to them, it says, “As for that sinful thing you made . . . [I broke it to bits and ground it thoroughly until it was fine as dust, and I threw its dust into the brook that comes down from the mountain]” (Deut 9:21). They said to him, is that proof? [It has also been said,] “[He took the calf that they had made and burned it, he ground it to powder] and strewed it upon the water and made the Israelites drink it” (Exodus 32:20), teaching that he tested them the same way they test the suspected adulteress. Rabbi Yosei said to them, but it says, “They abandoned their idols there” (II Sam 5:21) and “He also deposed his mother Maakhah from the position of queen mother because had made an abominable thing [for Asherah].” (I Kings 15:13). They said to him: Is there any proof from there? “Asa cut down her abominable thing [and burnt it in Wadi Qidron]” (II Kings 15:13). Rabbi Yosei said to them, but it says, “He broke into pieces the bronze serpent” (II Kings 18:4). They said to him, was this an idol? Didn’t Moses make it? This teaches that Israel went astray after it until Chizqiyah and his son came.