TgO Gen33:2 :וְשַוִי יָת לְחֵינָתָא וְיָת בְנֵיהוֹן קַדמוּתָא וְיָת לֵאָה וֻבנַהָא בָתְרָאִין‏ : he put the concubines and their children first and Leah and her children afterwards
See the entire entry for qdmwtˀ adv. in the first place