It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) fell ill, so the Prophet (peace and blessings be upon him) sent a physician to him. He cut one of his veins and then cauterised it. This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Abu Umamah bin Sahl bin Hunayf that the Messenger of Allah (peace and blessings be upon him) visited Sayyiduna As'ad bin Zurarah (may Allah be pleased with him) while he was suffering from "shawkah" (erysipelas or a throat ailment). When he (peace and blessings be upon him) went in to him, he said: "What a bad death this one will be! The Jews will say: '(If he were a prophet,) why did he not save him?' Yet I have no power over anything, neither for him nor for myself. And let them not blame (me) regarding Abu Umamah." So he (peace and blessings be upon him) ordered that he be cauterised, but he passed away. This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), provided that Abu Umamah is regarded by them as a Companion, and they did not record it.

Muhammad bin Abd al-Rahman bin Zurarah narrates from his paternal uncle, who said: Sayyiduna As'ad bin Zurarah (may Allah be pleased with him) was afflicted by an ailment which the people of Madinah call "dhibh" (a severe throat disease). The Messenger of Allah (peace and blessings be upon him) cauterised him, but he died. Then the Messenger of Allah (peace and blessings be upon him) said: "This is a bad death for the Jews; they will surely say: '(If he were a true prophet,) why did he not save his companion?' Yet I have no power over anything, neither for him nor for myself." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.