Musannaf Ibn Abi Shaybah 30685 — The one guilty of zina: how many

Sayyiduna Abu Bakr (may Allah be pleased with him) said: Ma'iz bin Malik (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) and confessed before him (peace and blessings be upon him) three times. I said: If you confess before him (peace and blessings be upon him) a fourth time, there will be a punishment! Then by his (peace and blessings be upon him) order he was confined, meaning he was stoned.