Chapter : "Not equal are those of the believers who sit (at home)..." (V.4:95)

That the Prophet (ﷺ) dictated to him: "Not equal are those of the believers who sit (at home) and those who strive and fight in the Cause of Allah." Zaid added: Ibn Um Maktum came while the Prophet (ﷺ) was dictating to me and said, "O Allah's Apostle! By Allah, if I had the power to fight (in Allah's Cause), I would," and he was a blind man. So Allah revealed to his Apostle while his thigh was on my thigh, and his thigh became so heavy that I was afraid it might fracture my thigh. Then that state of the Prophet (ﷺ) passed and Allah revealed:-- "Except those who are disabled (by injury or are blind or lame etc).

When the Verse:-- "Not equal are those of the believers who sit (at home)" (4.95) was revealed, Allah Apostle called for Zaid who wrote it. In the meantime Ibn Um Maktum came and complained of his blindness, so Allah revealed: "Except those who are disabled (by injury or are blind or lame..." etc.) (4.95)

When the Verse:--"Not equal are those of the believers who sit (at home)," (4.95) was revealed, the Prophet said, "Call so-and-so." That person came to him with an ink-pot and a wooden board or a shoulder scapula bone. The Prophet (ﷺ) said (to him), "Write: 'Not equal are those believers who sit (at home) and those who strive and fight in the Cause of Allah." Ibn Um Maktum who was sitting behind the Prophet (ﷺ) then said, "O Allah's Messenger (ﷺ)! I am a blind man." So there was revealed in the place of that Verse, the Verse:--"Not equal are those of the believers who sit (at home) except those who are disabled (by injury, or are blind or lame etc.) and those who strive and fight in the Cause of Allah." (4.95)

Not equal are those believers who sat (at home) and did not join the Badr battle and those who joined the Badr battle.