Obey Islamic laws and be mindful of one's actions .

This hadith is about the prohibition of drinking Nabidh, which is a beverage made from fermented fruits. It was narrated by Qais bin Wahban that he asked Ibn 'Abbas about his habit of drinking this beverage for twenty or forty years and Ibn 'Abbas warned him against it as it is forbidden in Islam. This hadith teaches us to stay away from things that are prohibited in Islam and to be mindful of our actions even if we have been doing them for a long time. We should also take advice from knowledgeable people when we are unsure about something and not rely on our own judgement alone.