Musannaf Ibn Abi Shaybah 32375 — Book of Faith

Sayyiduna al-Miswar bin Makhramah (may Allah be pleased with him) and Sayyiduna Ibn Abbas (may Allah be pleased with them both) both went in to Sayyiduna Umar (may Allah be pleased with him) when he had been stabbed. They said: "It is the time of prayer." Sayyiduna Umar (may Allah be pleased with him) said: "The one who neglects the prayer has no share in Islam." Then he prayed while blood was flowing from his wound.