דניאל ז:ח פירוש: רש״י

and behold Aram. וַאֲלוּ, like וַאֲרוּ, an expression of “behold.”

speaking arrogantly words of arrogance. That is Titus, about whom the Rabbis, of blessed memory, said (Gittin 56b) that he blasphemed and berated and entered the Heichal with brazenness.