Musnad Ahmad 25:1497

Hajjaj narrated to me, Israel informed us, from Abu Ishaq, from al-Arqam ibn Sharhabil, who said: I traveled with Ibn Abbas from Medina to al-Sham, and I asked him: "Did the Prophet, peace and blessings of Allah be upon him, make a will?" — and he mentioned its meaning — and he said: "The Messenger of Allah, peace and blessings of Allah be upon him, did not finish the prayer until he became very heavy. So he went out being supported between two men, and his feet were dragging on the ground. And the Messenger of Allah, peace and blessings of Allah be upon him, died and did not make a will."