By those, that run snorting
By the fast gallopers
By the snorting runners (the horses)
By those running and uttering cries
And/by the panting/changing colour , attacking forces/horses
God hereby swears by the fast gallopers,…
By oath of those that sprint, breathing heavily. (The horses used in Holy War.
By the snorting charge
By the charging horses that gallop (in the battlefield) and pant
I call to witness the panting and snorting chargers (of the warriors)
By the (steeds) that run, with panting (breath)