Sayyidina Bara ibn Aazib (RA) reported that Allah’s Messenger (SAW) said, Get me a shoulder piece or a slate.” Then he (had) inscribed on. “The holders back from among the believers” (Surah Nisa 95), Hazrat Umer ibn Umme Maktum inquired “ Is there a leave for me” hence it was revealed “not having any injury “.
[Bukhari 4594, Muslim 1898]