Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: When the Prophet Muhammad (peace and blessings be upon him) passed away, he was 63 years old. When Sayyiduna Abu Bakr (may Allah be pleased with him) passed away, he was also 63 years old. When Sayyiduna Umar (may Allah be pleased with him) passed away, he was also 63 years old.