It has been narrated on the authority of Ibn Umar that the Messenger of Allah ﷺ allowed two shares from the spoils to the horseman and one share to the footman. (Using translation from Muslim 1762a)
أَنَّ النَّبِيَّ ﷺ قَسَمَ فِي النَّفَلِ لِلْفَرَسِ سَهْمَيْنِ وَلِلرَّجُلِ سَهْمًا