it was related by Imam
Malik in "Al-Muwatta'", by
Ahmad in "Al-Musnad (Hadith Compilation)" by
Ibn Majah, and
Al-Nasa'y in their "Sunan (Hadith compilations classified by jurisprudential themes)",
Ibn Hibban in his "Sahih (Book of Authentic Hadith)", and
in "Al-Mustadrak", on the authority of
Jabir ibn ‘Atik, who said that the Prophet (peace be upon him) said,
“There are seven types of martyrs, other than being killed in the Cause of Allah: one who is killed in the Cause of Allah is a martyr, one who dies in a plague is a martyr, one who drowns is a martyr, one who dies of pleurisy is a martyr, one who dies of an abdominal disease is a martyr, one who dies in a fire is a martyr, one who dies under a collapsed building is a martyr, and a woman who dies during childbirth is a martyr.”
Al-Nawawy said that this is a Hadith Sahih (a Hadith that has been transmitted by people known for their uprightness and exactitude; free from eccentricity and blemish).
(Part No. 8; Page No. 348) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.