Josephus and the Roman historian Tacitus wrote about it:
"Besides these [signs], a few days after that feast, on the one- and-twentieth day of the month Artemisius, [Jyar,] a certain prodigious and incredible phenomenon appeared; I suppose the account of it would seem to be a fable, were it not related by those that saw it, and were not the events that followed it of so considerable a nature as to deserve such signals; for, before sun-setting, chariots and troops of soldiers in their armour were seen running about among the clouds, and surrounding of cities." - Jewish Wars, VI-V-3
"In the sky appeared a vision of armies in conflict, of glittering armour. A sudden lightning flash from the clouds lit up the Temple. The doors of the holy place abruptly opened, a superhuman voice was heard to declare that the gods were leaving it, and in the same instant came the rushing tumult of their departure." - Histories, Book 5, v. 13
In addition to the two quotes above, the Jerusalem Talmud and the Babylonian Talmud both speak of the western light going out every night from 30AD to 70AD, the red strap not turning white from 30AD to 70AD, the gates opening each night from 30AD to 70AD, and the black stone was picked 40 years in a row from 30AD to 70AD.
