The Prophet ﷺ fixed the ransom of the people of pre-Islamic Arabia at four hundred dirhams per head on the day of the battle of Badr. (Using translation from Abū Dāʾūd 2691)  

أَنَّ النَّبِيَّ ﷺ «جَعَلَ فِدَاءَ أَهْلِ الْجَاهِلِيَّةِ يَوْمَ بَدْرٍ أَرْبَعَمِائَةٍ»