Indra and Indrani:
In the Vedic period, on a 'Shravan Poornima' day (Full Moon Day of the
Hindu month of Shravan), the deities and the demons were fighting a
battle against each other. Unfortunately the demons were in a stronger
position as compared to the deities. The king of the deities, Lord
Indra, was very much worried about the result of the battle. His wife
Indrani (also known as Shashikala) could not see him worried and prayed
to the almighty. Indrani was a religious lady so she prepared a Talisman
with her religious power and tied it around Indra's right wrist. She
believed that this Talisman will safeguard Indra from the attack made by
the demons. She was actually right about her belief as that day the
deities won the battle and Lord Indra escaped unhurt.
Yama and Yamuna:
Yamuna was the sister of Lord Yama, the God of death. On every "Shravan
Purnima" Yamuna used to tie a sacred thread (Rakhi) to Lord Yama.
Since then it has become a tradition for the sisters to tie Rakhi to
their brothers on this day. And the brothers bestow blessings on their
King Bali and Goddess Laxmi:
According to the mythology Raja Bali was such a great devotee of Lord
Vishnu that Lord Indra felt insecured and he prayed Vishnu to help him
save his throne. Vishnu accepted Indra's prayer and overthrew Bali
beneath the earth. When Bali asked Lord Vishnu about such treatment,
Vishnu gave him boon of immortality and also promised to take care of
his kingdom. To keep his promise Vishnu left his residence,
'Vaikunthdham' to safeguard Bali's kingdom. Then the Goddess Laxmi, wife
of Lord Vishnu, went to Raja Bali as a poor brahmin lady and requested
him for shelter. She regarded Bali as her brother and therefore tied a
Rakhi on to him on the 'Shravan Poornima' day. When Bali wished to give
her some present she told him her true story and also told him that she
came here because Lord Vishnu is here to guard his kingdom. So if he
can, he should send Lord Vishnu back to Vaikunthdham. Raja Bali
immediately requested Lord Vishnu and Goddess Laxmi to return.
King Porus and Alexander's wife:
The ancient history of India tells us that when Alexander the great
came to India with a purpose to make India a part of his kingdom, he was
resisted by the brave king Porus. Bravery of Porus led the wife of
Alexander doubt the safety of her husband. Then the lady addressed Porus
as her brother and thus became his sister. And a bond of Rakhi was
established between them. That is why Porus never harmed Alexander.
Maharani Karnawati and Emperor Humayun:
In the Medieval Indian History the tale of Maharani Karnawati and the
Mughal Emperor Humayun relates to the tradition of Rakhi. Maharani
Karnawati was the queen of the Rajput Kingdom, Chittor, in Rajastan.
When Chittor was threatened by Bahadur Shah of Mewar, the Maharani sent
a Rakhi to Humayun, the Mughal Emperor of Delhi, and called him for
help. Humayun was aware of the significance of Rakhi in the Hindu
community so he immediately accepted her request to protect her. Nobody
forced him to do so but he did so only out of his respect for the
tradition of Rakhi.