Those who permitted cutting veins

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) sent a physician to Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him). He cut a vein of Sayyiduna Ubayy and cauterized that vein.

It is reported about Sayyiduna Imran bin Husayn (may Allah be pleased with him) that he cut veins.

It is narrated from Abu Mikin that he said: I saw Ibn Sirin by my water and asked him: "What are you doing here?" He replied: "I am cutting such-and-such a vein of my nephew."

It is narrated from Abd al-Malik bin Abi Sulayman that he said: I heard Mujahid say: "A vein or several veins of mine have been cut."

It is narrated from Sa'd bin Ibrahim that he said: I saw Urwah when he had been struck by this disease, meaning the disease that destroys a limb, so he had his leg amputated from the knee.

It is narrated from Amir that he said: The vein is to be wiped over with the hand.