Hadith: They killed him, may Allah kill them! Why had they not asked when they did not know? The cure for ignorance is inquiry. It would have been enough for him to perform Tayammum and to press – or bind – a cloth over his wound then wipe with wet hands over it and wash the rest of his body - Encyclopedia of Translated Prophetic Hadiths

Hadith: They killed him, may Allah kill them! Why had they not asked when they did not know? The cure for ignorance is inquiry. It would have been enough for him to perform Tayammum and to press – or bind – a cloth over his wound then wipe with wet hands over it and wash the rest of his body - Encyclopedia of Translated Prophetic Hadiths