Quintus Curtius Rufus, History of Alexander 9.2.24

9.2.24

Sero hostium legiones numerare coepistis, postquam solitudinem in Asia vincendo fecistis. Cum per Hellespontum navigaremus, de paucitate nostra cogitandum fuit: nunc nos Scythae sequuntur, Bactriana auxilia praesto sunt, Dahae Sogdianique inter nos militant.

"But it is the number, perhaps, of the horse and foot that excites your fears! for you have been wont, you know, to fight only against small numbers, and will now for the first time have to withstand undisciplined multitudes! The river Granicus is a witness of the courage of the Macedonians unconquered in fighting against odds; so too is Cilicia deluged with the blood of the Persians, and Arbela, where the plains are strewn with the bones of your vanquished foes. It is too late, now that you have depopulated Asia by your victories, to begin counting the enemy's legions. When we were crossing the Hellespont, it was then we should have thought about the smallness of our numbers, for now Scythians follow us, Bactrian troops are here to assist us, Dahans and Sogdians are serving in our ranks. But it is not in such a throng I put my trust. It is to your hands, Macedonians, I look. It is your valour I take as the gage and surety of the deeds I mean to perform.