Note 103
Rex regia arma fero (says Romulus, in the first consecration) .... bina postea (continues Livy, i. 10) inter tot bella, opima parta sunt spolia, adeo rara ejus fortuna decoris. If Varro (apud Pomp Festum, p. 306, edit. Dacier) could justify his liberality in granting the opime spoils even to a common soldier who had slain the king or general of the enemy, the honor would have been much more cheap and common.
The History Of The Decline And Fall Of The Roman Empire Fall In The EastChapter 46