It was narrated from 'Uqbah bin 'Amir that the Messenger of Allah (ﷺ) said:"There are five things, whoever dies of any of them is a martyr. The one who is killed in the cause of Allah is a martyr; the one who dies of an abdominal complaint in the cause of Allah is a martyr; the one who dies of the plague in the cause of Allah is a martyr; and the woman who dies in childbirth in the cause of Allah is a martyr

English translation · Sunan an-Nasa'i