This excerpt is taken from Sheikh Abi Abdul Saboor Abdul Ghafoor Damni's book Fazail al-Jihad.
عن عبد الله بن عمر رضي الله عنهما قال أمر رسول الله صلى الله عليه وسلم فى غزوة مؤتة زيد بن حارثة فقال رسول الله إن قتل زيد فجعفر وإن قتل جعفر فعبد الله بن رواحة قال عبد الله كنت فيهم فى تلك الغزوة فالتمسنا جعفر بن أبى طالب فوجدناه فى القتلى ووجدنا ما فى جسده بضعا وتسعين من طعنة ورمية
Abdullah bin Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace be upon him) appointed Zaid bin Harithah (may Allah be pleased with him) as the commander of the army in the Battle of Mu'tah. The Prophet (peace be upon him) said: "If Zaid bin Harithah is martyred in the battle, then Ja'far (may Allah be pleased with him) will be the commander, and if Ja'far (may Allah be pleased with him) is martyred, then Abdullah bin Rawahah (may Allah be pleased with him) will be the commander." Abdullah bin Umar (may Allah be pleased with them both) says that I also participated in this battle. After the battle ended, we searched for Ja'far bin Abi Talib (may Allah be pleased with him) and found him among the martyrs. We saw more than ninety wounds of spears and arrows on his body.
Reference: (Sahih Bukhari)
Reference: (Narrated by Bukhari, Book of Military Expeditions, Chapter: Battle of Mu'tah from the land of Sham, Number: 4261)
And in another narration, it is mentioned that all the wounds were on his front side:
عن ابن أبى هلال قال أخبرني نافع أن ابن عمر أخبره أنه وقف على جعفر يومئذ وهو قتيل فعددت به خمسين بين طعنة وضربة ليس منها شيء فى دبره يعني ظهره
Narrated from Nafi' that Ibn Umar (may Allah be pleased with them both) told him that I was standing by the body of Ja'far (may Allah be pleased with him), and I counted fifty wounds of spears and swords on his body, none of which were on the back.
Reference: (Sahih Bukhari)
Reference: (Narrated by Bukhari: Book of Military Expeditions, Chapter: Battle of Mu'tah from the land of Sham, Number: 4260)
Derived Benefits
➊ Muta was an area in the evening; the Messenger of Allah, peace be upon him, sent an army of three thousand to this area. Nearly one hundred thousand Christians gathered for the battle. A fierce and intense war took place, and Allah Almighty granted victory to the Muslim army of three thousand in this battlefield.
➋ From this hadith, the bravery and courage of Hazrat Ja'far ibn Abi Talib, may Allah be pleased with him, can be understood, as despite being covered in wounds, he continued to fight until the end. On the front side of his body, there were ninety wounds from spears and swords; the remaining wounds were on other parts of his body.
➌ To encourage others, describing the condition of the martyr: From the mentioned hadith, there is evidence of describing the body and condition of the martyr to motivate and encourage others, as Abdullah ibn Umar, may Allah be pleased with both of them, described the number, condition, and appearance of the wounds of Sayyiduna Ja'far ibn Abi Talib, may Allah be pleased with him.
