The greatness of Shani is best understood through the stories where he dispensed his unique justice. These are verified from the Brahmanda Purana and Narada Purana .
Similarly, Dhaiya (2.5 years) occurs when Shani transits the 4th or 8th from the moon. It brings sudden upheavals, health issues, or financial blocks—all designed to correct past errors. shani mahatmya in english verified