What is the ruling on drinking juice in which a percentage of alcohol was discovered after drinking one sip of it?

If the presence of alcohol in juice is known, it is not permissible to drink it, even if the percentage is small, based on the Prophet's (peace be upon him) saying: "That which intoxicates in large quantities is unlawful in small quantities," and "Every intoxicant is unlawful." An exception is made if the alcohol percentage transformed into another non-intoxicating substance before being mixed with the juice. As for what you drank previously without knowing about the presence of alcohol, there is no sin upon you for it.