It is narrated from Hazrat Bara’ (may Allah be pleased with him) that the initial verse of the Holy Qur’an was revealed:“Those among the Muslims who sit back (without participating in jihad) and those who strive in the way of Allah are not equal.”The Noble Prophet (peace and blessings be upon him) called Hazrat Zaid (may Allah be pleased with him) and instructed him; he brought a shoulder blade and wrote this verse on it. Upon this, Hazrat Ibn Umm Maktum (may Allah be pleased with him) complained about his blindness, so the words“except those who have a disability”were additionally revealed in this verse.