Hafez
At age 60 he is said to have begun a chelleh-nashini, a 40-day-and-night vigil by sitting in a circle which he had drawn for himself. On the 40th day, he once again met with Zayn al-Attar on what is known to be their fortieth anniversary and was offered a cup of wine. It was there where he is said to have attained "Cosmic Consciousness". Hāfez hints at this episode in one of his verses where he advises the reader to attain "clarity of wine" by letting it "sit for 40 days".