Hadith.5088 - Al-Halabi narrated from Abu Abdullah (as) who said
"If a man entered Islam, acknowledged it, and then drank alcohol, committed adultery, and consumed usury, without having any knowledge of what is lawful and unlawful, I would not administer the legal punishment upon him if he was ignorant - unless there was evidence that he had recited the Surah in which adultery, alcohol, and usury are mentioned. If he was unaware of that, I would inform and educate him. But if he committed those acts after that, I would flog him and enforce the legal punishment upon him."