Hadith.4214 - Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said:
"Whoever is compelled by necessity to eat from a dead animal, blood, or the flesh of a pig, yet refrains from eating any of it until he dies, then he is considered a disbeliever."
This narration is recorded in "Nawadir al-Hikmah" by Muhammad ibn Ahmad ibn Yahya ibn Imran al-Ash'ari.