Is a wife who died after suffering from an illness and whose death was caused by a heart problem considered a "shaheeda" (martyr)? And is she in Illiyin (the highest heaven)? And does the day of death have a special virtue?

We ask Allah to have mercy on this sister and to grant you solace in your bereavement. We remind you of the reward found in patience. We hope that this woman is a martyr, for the Prophet, peace and blessings be upon him, said: "The martyrs are five: the one who dies of plague, the one who dies of a stomach ailment, the drowned, the one who dies under a falling building, and the one martyred in the cause of Allah, the Mighty and Majestic." As for merely dying on a Monday, no specific virtue has been reported concerning it.