The Prophet (ﷺ) was dictating to me the Verse: " Not equal are those of the believers who sit (at home) and those who strive hard and fight in the Cause of Allâh " (V.4:95). Meanwhile Ibn Umm Maktum came and said, "O Allâh's Messenger (ﷺ)! If I had power, I would surely take part in Jihad." He was a blind man. So Allâh sent down the revelation to His Messenger (ﷺ) while his thigh was on mine and it became so heavy for me that I feared that my thigh would be broken. Then that state of the Prophet (ﷺ) was over after Allâh revealed 66..... except those who are disabled (by injury or are blind or lame etc.) " [4:85-O.B]