Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: Sayyiduna Sa'd bin Mu'adh (may Allah be pleased with him) was struck by an arrow on the day of Banu Qurayzah and Banu al-Nadir, and his forearm vein (akhal) was severed, so the Messenger of Allah (peace and blessings be upon him) cauterised it. At that he became restless and writhed, so he cauterised it a second time. Then Sa'd (may Allah be pleased with him) said: O Allah! Do not take my soul until You have cooled my eyes concerning Banu Qurayzah and Banu al-Nadir.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5307