Bhishma

Bhishma lay on the bed of arrows that Arjuna shot at him.
He had given up when faced with Shikhandi.
Shikhandi was Amba, who was reborn as a man (after horrible penance and self-immolation) to avenge herself upon him.
He had refused to marry her because of his vow of celibacy.
Before he took that terrible vow (bhishma), he was known as Devrata.
He remembered these things as he waited to give up his life.
He lay on the bed of arrows till the end of the Mahabharata war and then decided to die.