Hadith 2808

حَدَّثَنَا أَبُو كُرَيْبٍ ، حَدَّثَنَا ابْنُ الصَّلْتِ ، عَنْ ابْنِ أَبِي الزِّنَادِ ، عَنْ أَبِيهِ ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ ، عَنِ ابْنِ عَبَّاسٍ ، أَنّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " تَنَفَّلَ سَيْفَهُ ذَا الْفَقَارِ يَوْمَ بَدْرٍ " .
It was narrated from Ibn ‘Abbas that the Messenger of Allah (ﷺ) acquired his sword Dhulfiqar, from the spoils of war on the Day of badr.
Hadith Reference سنن ابن ماجه / كتاب الجهاد / 2808
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Related hadith on this topic
Explanation & Benefits
Maulana Ataullah Sajid
Benefits and Issues:
➊ Allah Almighty has designated one-fifth of the spoils of war (ghanimah) for Allah and His Messenger. (Surah Al-Anfal, verse: 41) In an Islamic government, this portion is deposited into the public treasury (Bayt al-Mal) and spent on the collective needs of the Muslims.

➋ The Messenger of Allah (sallallahu alayhi wa sallam) used to fulfill his personal expenses from the one-fifth share of the spoils (khums). Therefore, for the need of jihad, he also took a sword from the khums.

➌ This sword is called Dhu’l-Fiqar because it had some deep marks on it, similar to the vertebrae of the spine. (See: Al-Nihayah by Ibn Athir, under the root "faqar")
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 2808
Shaykh Dr. Abdur Rahman Freywai
Explanation:
1:
Because after returning from battle, going back again for jihad is a difficult task.
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 1561