And it was narrated by Misma' Kardin from Abu Abdullah عليه السلام, regarding four witnesses who testified against a man for adultery, and he was stoned. Then one of them retracted and said: "I doubted my testimony." Imam عليه السلام said: "He must pay the blood money." I said: What if he said: "I testified against him intentionally"? Imam عليه السلام said: "He is to be executed."