The son of P'tur [interpreted: if two are walking on the road and there is a jug of water, and it is insufficient for both to drink, they should both drink and die (Sifra, Behar) until R' Akiva interpreted: your life takes precedence (Baba Metzia 62a)].
Seder_HaDorot,_Tanaim_and_Amoraim.746:1