Sayyiduna Ubadah bin al-Samit (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) came to visit me (when I was ill) and said: "Do you know who the martyrs of my Ummah will be on the Day of Resurrection?" The people remained silent, so I said: "O Messenger of Allah! The one killed in the way of Allah, and the one who is patient and hopes for the reward, is a martyr." He (peace and blessings be upon him) said: "If the martyrs of my Ummah were only these, then they would be very few. The one killed in the way of Allah is a martyr, the one who drowns is a martyr, the one who dies of a disease of the stomach is a martyr, (dying of) plague is martyrdom, and the woman in postnatal bleeding (who dies in childbirth) will be drawn into Paradise by her child by its umbilical cord."
Imam al-Tabarani (may Allah have mercy on him) said: "Only Shayban and Sa'id bin Bashir narrated this hadith from Qatadah, and Adam is alone in narrating it from Shayban."
This is how it is in the printed edition of Dar al-Haramayn; the correct reading is probably 'Rashid bin Hubaysh'.
Hadith Referenceالمعجم الأوسط / باب الهاء / 9314
Hadith Takhrij«أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 307، 308، 352، 353، 354، والدارمي فى «مسنده» برقم: 2458، وأحمد فى «مسنده» برقم: 16246، 18076، 23124، 23125، 23142، 23199، 23231، والطيالسي فى «مسنده» برقم: 583، 579، والبزار فى «مسنده» برقم: 2692، 2693، 2710، وابن أبي شيبة فى «مصنفه» برقم: 19822»