The 8 Immortals (चिरंजीवी / Chiranjeevi ) as per Hindu History !

Whoever is born is sure to die. Even in the Srimad Bhagabat Gita, Bhagaban Sri Krishna also gave this knowledge to Arjuna that "Only the soul is immortal, and it holds different bodies for a certain time, the body is mortal." But according to Hindu history and mythology, there are Eight such people who are immortal / Chiranjeevi. All this is bound by some word, rule or curse and it is endowed with all divine powers. The Ashta Siddhis mentioned in Yoga have all the powers in them.

अश्वत्थामा बलिव्र्यासो हनूमांश्च विभीषण:।

कृप: परशुरामश्च सप्तएतै चिरजीविन:॥

सप्तैतान् संस्मरेन्नित्यं मार्कण्डेयमथाष्टमम्।

जीवेद्वर्षशतं सोपि सर्वव्याधिविवर्जित।।

That is, by remembering these eight people (Ashwathama, Daityaraja Bali, Ved Vyas, Hanuman, Vibhishana, Kripacharya, Parashurama and Markandeya Rishi) in the morning, all diseases end and man attains the age of 100 years. On the basis of ancient beliefs, if a person takes the names of these eight immortal people (Ashta Chiranjeevi) every day, then his life is long.

Ashwatthama-

Ashwatthama is the son of Guru Dronacharya, who is still wandering the earth for his salvation. According to the Mahabharata, the Ashwatthama period was an integral part of anger, yama and Lord Shiva. When there was war between the Kauravas and the Pandavas in Dwaparyuga, Ashwatthama sided with the Kauravas. Ashwatthama was a very strong, fierce-tempered warrior. According to religious texts, it was Lord Krishna who cursed Ashwatthama for wandering on the earth for a long time due to his crimes.
The popular belief regarding Ashwatham is a fort 20 km from the city of Burhanpur in Madhya Pradesh. It is called the fort of Asirgarh. This fort has an ancient temple of Lord Shiva. Local residents say that Ashwatthama comes to this temple every day to worship Lord Shiva, So he can get salvation.

Raja Bali - 

According to the scriptures, King Bali is a descendant of the devotee Prahlad. Bali sacrificed everything to the Vamana avatar of Lord Vishnu. For this reason, he is known as Mahadani. Lord Vishnu was very happy with King Bali. Due to this, Shri Vishnu also became the gatekeeper of King Bali and gave immortality to him as blessings.

Rishi Vyasa - 

Ved Vyas was the son of sages Parashar and Satyavati. He was born on an island in the river Yamuna and had a dark complexion. For this reason, he is called as Krishna Dvaipayana. The sage is also Ashta Chiranjeevi and he edited the four Vedas (Rigveda, Atharvaveda, Samaveda and Yajurveda). Also, he also composed all 18 Puranas. The Mahabharata and the Srimad Bhagavat Gita have also been composed by Veda Vyasa.

Lord Hanuman - 

Shree Hanuman is the incarnation of Lord Shiva. In Kali Yuga, Hanumanji is considered to be the earliest pleased deity and Hanumanji is also one of these Ashta Chiranjeevi. Mata Sita blessed Hanuman after hearing Rama's message at Ashoka Vatika in Lanka that he would remain ajar-immortal. Azar-Amar means one who will never die and will never grow old. For this reason, Lord Hanuman has always been considered a source of power because he is an incest.

Lord Parasurama - 

Parashurama is the sixth incarnation of Lord Vishnu. Parashurama's father was Rishi Jamadagni and mother Renuka. He was born on Tritiya of Shukla Paksha of Vaishakh month according to Hindi Panchang. Therefore, Tritiya which falls on the Shukla Paksha of Vaishakh month is called Akshaya Tritiya. Parshuram's birth time is believed to be in the treaty of Satyuga and Treta. Parashurama killed all the Kshatriya kings from the earth 21 times. Parashurama's initial name was Rama. Rama did harsh penance to please Shiva. Shiva was pleased with penance and gave Rama his fursa (a weapon). This is why Ram started being called Parashuram.

Vibhishan - 

Vibhishan is the younger brother of the demon king Ravana. Vibhishan is an exclusive devotee of Shri Ram. When Ravana had killed Mother Sita, Vibhishana had explained to Ravana not to enmity with Rama. On this matter Ravana expelled Vibhishana from Lanka. Vibhishan went to the service of Shri Ram and supported religion in eradicating Ravana's iniquity.

Kripacharya - 

According to the Mahabharata, Kripacharya was the vice-chancellor of the Kauravas and the Pandavas. Kripacharya Gautam Rishi is the son and his sister's name is Kripi. Kripi was married to Dronacharya. Kripacharya is the maternal uncle of Ashwathama. In the Mahabharata war, Kripacharya also sided with the Kauravas against the Pandavas.

Rishi Markandeya - 

The sage Markandeya is an ardent devotee of Lord Shiva. He pleased Shiva and meditated and became Chiranjeevi due to Mahamrityunjaya mantra Siddhi.