GuruCharitra Adhyay 3 is in Marathi. Saraswati Gangadhar is telling Namdharak that he always has only pothi (book) with him. That pothi is Gurucharitra. If we read/listen Guruchatria then we receive everything, whatever we desire becomes fulfilled. Those who want money receive money. Son, Daughter, and their children, knowledge, Bhukti and Mukati and every wish are fulfilled. Devotees who read this Gurucharitra in seven days they receive good and sound health, their diseases are removed. Such devotees having no issue receive child. Their troubles caused by planets are removed. They receive true knowledge and a longer life.
This adhyay 3 also describes a story about Ambarish. Ambarish was a great devotee of God Vishnu. He uses to keep fast on every Dwadashi which is called as Dwadashi Vrat. Rushi Durvas wanted to test Ambarish’s devotion towards God Vishnu. On failing in the test Durvas Rushi cursed Ambarish. God Vishnu appeared and intervened. He took the cursing on him. Because of the curse God Vishnu had to take 10 births on this earth. So this is a story of why God Vishnu has to take ten incarnations.