Hinduism has its own glory and many Maharishis and Sages in india. Thousands of years ago Great Maharishis and sages were doing great Holy Rituals and divine practices in india.

They are immortal Souls those who can live forever in the universe. One of those great Maharishi is Sri Atri Maharishi and his wife is Mata Anusuya Devi. Atri Maharishi is one of the sons of Lord Brahma.

Mata Anusuya devi is very famous for her great devotion to his Husband Atri Maharishi and her Chastity(Pativiratha Dharma).They had three sons and one daughter including Soma, Dattatreya, and Durvasa and Shubhatreyi, who are the incarnations of trinity Lord Brahma, Vishnu and Siva.

One day the wives(Lord Parvati, Lakshmi and Saraswathy) of Lord Shiva, Vishinu and Brahma were decided to test her chastity and asked their husbands to visit Atri Maharishi's hermitage when he is not there.As per their wish they went there in the form of ascetics and asked Mata Anusuya devi for alms. She was very happy and called them inside and went to bring the alms they asked. When she came back the ascetics requested her to serve food with nakedness. She was surprised and was in great trouble to do so. She prayed his husband in thought and with the power her chastity and great devotion to her husband, she turned those three ascetics into infants. She fed them with great care as a mother.

When heard about this, Lord Parvati, Lakshmi and Saraswaty were worried and went there to ask Mata Anusuya Devi to bring their Husbands in their original form.

So Atri maharishi and Mata Anusuya devi asked them to bless them with a child as an incarnation of those three Gods Lord Shiva, Vishnu and Brahma. They blessed them with the Child Sri Lord Dattatreyar as an incarnation of Trinity Gods.

Sri Atri Maharishi is the first among the Sapta Rishis who is immortal soul living forever and blessing his devotees. It's believed that he also written many palm leaves containing predictions and life cycle of every person born in the earth which is known as "Olai Chuvadi".