Sayyiduna Anas (may Allah be pleased with him) said: The minimum duration of menstruation is three days. Imam Darimi (may Allah have mercy on him) was asked: Is this your opinion as well? He replied: Yes, when the habit is such, then the duration of menstruation is three days. Sufyan said: I asked Imam Darimi (may Allah have mercy on him) about this, and he said: The minimum duration of menstruation is one day and one night, and the maximum is fifteen days.