It was narrated from ‘Ubadah bin Samit that the Prophet (ﷺ) awarded one quarter of the spoils to those who attacked the enemy at the beginning and one third to those who attacked at the end.
Sunan Ibn Majah Book 24, Hadith 100
← Previous Hadith It was narrated from Habib bin Maslamah that the Prophet (ﷺ) awarded one third (of the spoils of war) after the one fifth (had been taken).

Sunan Ibn Majah Book 24, Hadith 99 Next Hadith → “There is no awarding of the spoils after the Messenger of Allah (ﷺ), rather whatever the army acquires (of spoils of war) will be distributed among strong and weak alike.”

Sunan Ibn Majah Book 24, Hadith 101