In Hindu ancient history, a number of beings gain the boon of svecchāmṛtyu in reward for their actions, allowing them to choose their time and manner of death.
In the Mahabharata, King Shantanu is stated to have granted the boon of svecchāmṛtyu to his son Bhishma for his selflessness, allowing him to choose the time and manner of his own death.
[1] Indra is stated to have granted Hanuman svecchāmṛtyu in acknowledgement of the deity's resilience after surviving the attack of his thunderbolt.
[4] According to Aurobindo, the sadhaka of Integral yoga aims at complete liberation from all attacks of illness, and the power to prolong life at will – icchāmṛtyu.
Acquaintances of Mahatma Sisir Kumar and Pandit Dinabandhu Vedantaratna also attest to the fact that they have willed their own death.