Rishyasringa (Sanskrit: ऋष्यशृङ्ग; IAST: Ṛṣyaśṛṅga; Pali: Isisiṅga) is a rishi mentioned in Hindu and Buddhist scriptures from the late first millennium BCE.

According to the Hindu epics Ramayana and Mahabharata, he was a boy born with the horns of a deer who became a seer and was lured by royal courtesans, which led to the yajna (fire sacrifice) of King Dasharatha.

According to the Mahabharata, Vibhandaka, a renowned sage and a son of Kashyapa, travels in Mahahrada, when he sees Urvashi, the most beautiful apsara (nymph).

According to the Ramayana, Rishyasringa was the chief priest when the King Dasharatha performed a yajna to beget progeny, and Rama, Bharata, and the twins Lakshmana and Shatrughna were born.

A human boy named Isisiṅga (Pali) is later born to the deer and he grows up in complete seclusion from mankind, and most importantly, from womankind.

He then convinces the King to send his daughter to seduce him and to break the austerity of the young seer and to reduce his ascetic power.

The King and his daughter accept Sakka's reasoning and in good faith – and for the benefit of the country – agree to be part of the plot.

[6] The girl dresses up as an ascetic and while the father is away gathering roots and fruits in the forest, she manages to seduce the boy, who has never seen a woman before.

He succumbs to worldly responsibilities, eventually becoming king and fathering 32 children before retiring again to the forest and regaining his former powers.

There is a temple of rishyashringa named 'Chehni fort' situated in Banjar tehsil of Kullu District Himachal Pradesh.

[10] In the Kullu district of Himachal Pradesh and at Kigga near Sringeri town of Karnataka, there are temples dedicated to Rishyasringa and his wife Shanta.