On Berayshit 37:2, the Torah says:
"וַיָּבֵא יוֹסֵף אֶת־דִּבָּתָם רָעָה אֶל־אֲבִיהֶם"
According to proper grammar, shouldn't it have said dibbatam ha'ra'ah since ra'ah is modifying a definite noun?
The definite accusative marker את along with the possessive suffix -ם are evidence that dibbatam is a definite noun.