Amr bin al-Jamuh came to the Messenger of Allah ﷺ and said, "Messenger of Allah, tell me, if I fight in the cause of Allah until I am killed, will I walk in Paradise on this leg of mine sound and whole?" His leg was lame.The Messenger of Allah ﷺ replied, "Yes."He was killed on the day of Uhud, along with his nephew and a freed slave of theirs. The Messenger of Allah ﷺ passed by him and said, "It is as though I can see you walking in Paradise on this leg of yours sound and whole."Then the Messenger of Allah ﷺ gave instructions concerning the two of them and their freed slave, and they were placed together in a single grave.
أتى عمر بن الجموح إلى رسول الله ﷺ فقال: يا رسول الله! أرأيت إن قاتلت في سبيل الله حتى أقتل أمشي برجلي هذه صحيحة في الجنة- وكانت رجله عرجاء- فقال رسول الله ﷺ: نعم فقتلوه يوم أحد هو وابن أخيه ومولى لهم، فمر عليه رسول الله ﷺ فقال: كأني أنظر إليك تمشي برجلك هذه صحيحة في الجنة فأمر رسول الله ﷺ بهما وبمولا هما فجعلوا في قبر واحد.
Ahmad narrated it (22553) from Abu Abdul-Rahman Muqri, who said, Haywa told us, Abu Sakhr Humayd bin Ziyad told us, that Yahya bin Nadr told him, from Abu Qatada, and he related it. Its chain of transmission is hasan, on account of Humayd bin Ziyad Abu Sakhr, for there is disagreement about him. Nasai judged him daif, while others accepted him, though he is described as prone to error. Among his errors in this hadith is his mention of "their freedman," for the correct account is that the two of them, that is, Abdullah bin Amr bin Haram Ansari, the father of Jabir, and Amr bin Jamuh, were buried in a single grave.Ibn Hajar graded the hadith hasan in Fath al-Bari (3/216), and said, Ibn Abdul-Barr said in Tamhid, "He is not his nephew, but rather his cousin." And it is as he said, so perhaps he was better than him. End of quote.As for Jabir's statement, "so I dug him out after six months," its apparent meaning conflicts with what is recorded in the Muwatta from Abdul-Rahman bin Abu Sasaa, that word reached him that the flood had washed away the grave of Amr bin Jamuh and Abdullah bin Amr Ansari, who had been in a single grave, so it was dug open around them in order to move them from their place, and they were found unchanged, as though they had died only the day before, and between the Battle of Uhud and the day their grave was opened lay forty-six years.This is supported by what Muhammad bin Ishaq related, for he said, My father told me, from elders of the Ansar, who said, "When Muawiya had a channel dug that passed by the graves of the martyrs, the water burst forth upon them, so we came and pulled the two of them out," meaning Amr and Abdullah, "and upon them were two cloaks with which their faces had been covered, and on their feet was some plant growth from the earth, and we brought them out bent as though they had been buried only the day before."Ibn Hajar reconciled the two reports by saying, "Either what is meant by their being in a single grave is that the graves were close together and adjoining, or the flood breached one of the two graves so that they became like a single grave."I say, there is nothing in the narration of Bukhari indicating that Jabir bin Abdullah, after digging him out following six months, reburied each of the two in a separate grave. For perhaps, after seeing him as though he had been placed in his grave that very day, he left the two of them as they were until the flood came in the time of Muawiya and uncovered their grave.