Another chain from Ibn 'Abbas that the Prophet ﷺ took his sword Dhul-Fiqar on the Day of Badr, and it is the one that he saw in the dream on the Day of Uhud.
This Hadith is Hasan Gharib. We only know it from this route through the report of Ibn Abi Az-Zinad.
The people of knowledge differ over giving the Nafl from the Khumus. Malik bin Anas said:
"It has not reached me that the Messenger of Allah ﷺ gave the Nafl during every expedition, but it has been conveyed to me that he gave the Nafl in some of them. That is according to the discretion of the Imam during the beginning of the division of the spoils or the end of it."
Ibn Mansur said: "I said to Ahmad: 'The Prophet ﷺ gave the Nafl when he divided the fourth, after the Khumus, and when he was returning (he gave) the third from the Khumus.' So he said: 'The Khumus is taken, and then the Nafl is given from what remains, nothing beyond this.''"
[Abu 'Eisa said:] This Hadith is (understood) as Ibn Musayyab said: "The Nafl is from te Khumus." Ishaq said as he said.
• Jami` at-Tirmidhi, Vol. 3, Book of Military Expeditions, Hadith 1561b
• Jami` at-Tirmidhi, Book of Military Expeditions, Hadith 1561b